Having been on SA for a number of years, I am contemplating taking a brief hiatus and starting over.  The purpose would be to refresh my "Member Since" date.  Why?  Because when I see a SB profile and note that she's been on the site for greater than 4 to 5 years, I immediately loose interest.  Part of the allure is the new SB.

Premium members can hide that date, as well as "Last Active." If you don't want to keep your profile name, that can be changed as well.

I don't get how that helps.

As hobbyist says, you can hide your length of membership info if you like and see if there's a difference in your activity.  But to get a newer starting date displayed, you would indeed have to quit and start over.  But I wonder why you feel this way?  A new SB is one who is new in my bed.  I don't care where she's been before that!  And the thrill of breaking in a real sugar newbie can be fun but also tedious and time consuming.  Sometimes I see a SB with a years old starting date who I've never seen pop up before.  Since I've been monitoring the site daily for years, this intrigues me.  Most often it's a SB who has experience but only just moved to my area and so changed her city location on her profile. Sometimes meeting a SB who has experience, knows the score, and finds me interesting and attractive is truly refreshing and speeds up the whole process.  I had one like that around Christmas last year.  She was in town for just a few weeks and mos def wanted to hook up.  We had such a fantastic first date, (including going greek!), that we managed to meet twice more before she left.  That never would have happened so quickly with a newbie.  Sometimes the women who have been around for a while are the best!

I also don’t mind those that have been around for a bit. With a pot who is not an obvious pro and has been on the site for less than a month you often need to plan a few messages before she may make up her mind and sometimes they get hit with so many messages they never catch up and have too many offers to choose from. As sweetman stated an experienced SB knows the score. With pots who have been on the site for a year+, I write a polite, straight to the point message that new pots may not appreciate.  

There is no hard rule that says "x" years on the site is good and "x+y" years is bad.  
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Each POT will see your tenure in the sugar bowl differently, some will appreciate a seasoned Daddy who "knows what he wants and how to keep his SB happy", while others will look at that same guy as a "pump and dump" Daddy. On the other hand, a newer Daddy could be seen as an easy mark for an experienced SB (Shark Baby in this case) or she could see him as a "long term, "honest" daddy who won't be a jerk.  
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So I think the real question the Op should be asking is "how do you answer questions about how long you have been on the site/in the sugar bowl and how many arrangements you've already had (or currently have)?"  
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To answer this, my suggestion is that vagueness is your friend, especially until you better understand what she is looking for.  I always block my join date.  This allows me to answer questions without using specific numbers.
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Question:  
How long have you been on the site, and how many arrangements have you had?
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If you want to come off like an experienced, responsible Daddy:  
Bad answer: I've been on 9 years and had 27 arrangements.  
Better answer: I've been on a long time and had a lot of bad arrangements, but fortunately my last 3 were great.  
Still better: I've been on for a little while, and I've met a few wonder people. Those were great experiences.  
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If you want to come off like a newer but still experienced Daddy:  
Bad: I just put up a new profile, and I'm looking to find someone quickly before I have to spend more for the site
Better:  I was on a while ago. When I broke it off with my last Sugar Baby for cheating, I realized it was time to start looking again.  
Still better: I started a while ago and found someone wonderful.  As it turned out, she moved back east last year to go to grad school.  So I recently decided to come back on the site to see if magic can happen again - and after meeting you - I have my answer.  
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So you get the idea... no numbers is good. Focus on her opportunity to find a great guy, not on your need to bang another slut for cash.  
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If you only want to date newbie SB's that's your thing. But don't make the same mistake a POT SB might make by assuming that a lot of sugar experience is necessarily bad.  You need to ask more questions and then listen to the answers before you commit to a strategy of how to bring her into your line up.  
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Life is good.
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The Cat

One of the reasons that I've gone exclusively SB vs. hookers is that mileage (perceived or real) is important to me.  Meaning, my requirement is a lady who is phenomenal in bed, while the preference be that she is not a pro or pro-SB.  I enjoy the organic nature of the SB-SD relationship. Even though I'm exclusive PPM, I desire the SB not to see me as a client or our arrangement as primarily transactional.  Yes...want my cake and to eat it as well.  However, you do bring up angles on the experienced SB that I've not considered.

No evidence or data that states it will help.  Hence my question to this group.  Does the length of time a SB is on SA have any affect on your interest level?  I've had POT SB's specifically ask about my experience on the SA platform.

Completely agree and this is my strategy.  Some variation of "I've had wonderful long term arrangements with phenomenal memories.  Looking to re-create.  Will incorporate some of your words.  Thank you.

When I encounter a SB who has had a profile up for years, here's how I approach her:  "I see that you've been a member on here for a while and I hope that means you've enjoyed some wonderful arrangements and are ready for more.  That's my own situation too.  Let's talk!"