I think that as a client I can be more convincing when I say that the smart thing all around is to ghost.

 
I know my fellow clients may be upset with me on this, but it is true.   I speak as one who has been ghosted many times - some situations I think I know the reason, and others I can only guess at.  

 
in any case, as upsetting as it can be to have a provider ghost on you, the alternative is worse.  (Endless back and forth debating things, hurt feelings, etc.)

 
And yes, I have ghosted on some providers, so it is a two-way street.

You describe just a general they "made me feel uncomfortable" but also that "they both did not do anything wrong."  
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IF you thought they were crazy or dangerous, then I absolutely agree that ghosting is the way to go.  
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IF you just have a general feeling about them, I'd ask if you know if they have TER Reviews and, even more important, a good reputation on TER. (Good rep based on Board posts or quality Reviews or both.) If you ghost guys with good reps they might write something on the Boards, such as "She ghosted me!" That might sting for a while but continuing good reviews should overcome it in short order.  
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IF they seem sane and understanding (from your meeting and TER rep), then I think there's a way to be polite about using "chemistry" as an excuse. "Everything was great! But the chemistry wasn't there for me. It's not you, it's me." Of course, that can also lead to posts to the Boards. "She said she didn't want to see me anymore. She gave me the 'It's not you, it's me' routine!"  
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I guess what I'm saying is, I dunno.

It has happened to me before and I don’t get it in that I have actually seen the provider/s multiple times and we had a very good time always. Although I emailed and txtd multiple times I need to move on. Sad because they were incredible yet there is more out there to have fun with just wish I had an answer.

Of course we all have likes and dislikes, so I'm curious as to your actual reasons for not wanting to see those clients.  
What exactly was it that you did not like? Was it something they could do differently and would that change your mind about them?

I completely disagree with the guys who say to ghost.  
We are all supposed to be mature enough to handle this lifestyle. Yet, so many providers and clients play ridiculous games. I have been ghosted before meeting, and also after meeting. My approach is the same every time - speak and act like a gentleman, but never given an explanation.

I can handle an honest answer for why a provider would not see me a second time.  An explanation of why a provider would not want to see me before we meet would also be very helpful so I know if there is some issue I need to address.

Real honesty would be a refreshing change.

As much as it pains me to say it, the right answer here is to ghost them.

I remember back in the day when dating, I hated it when women lied and turned down a date and said they had a conflict in their schedule. When a person asks another time and gets the same response, it leaves things hanging in a tortuous way for them.  

If a person gets turned down, they obviously want to know exactly why.

But this is different. And it's also not exactly the same as a pure business transaction either.

The key words that Adeline used are "They did not do anything wrong." This means either; she can't effectively articulate exactly why she doesn't want to see them, or she feels like nothing she says can make a difference, or some combination of the two. This means that trying to explain will most likely open a can of worms that she doesn't need to deal with.

Also. Sucks to be those two guys. But if we've all been ghosted at one time or another, maybe it sucks less than being told we come off weird or creepy.

Clients need to plan their time just like providers. A simple "I will be unable to meet you" is sufficient for them to know to move on with their plans. No explanation needed - just short and to the point. If they try to find out why with follow up emails / texts, then, yes, ghost them.