Never had one of those turn into anything.

Seen this over and over again.  There is a "heart" button for each profile listed in a search result. It can easily be checked without ever looking at the profile.  So I assume they just scan the list for POT SD's who have certain criteria - probably income and/or net worth - and just tick the hearts for all that look interesting.  
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I've only had one conversation with a POT SB that insisted she had reviewed my profile. And she was able to back it up even though the site never showed me that she had done so.  
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It's possible the site had a glitch. Or it's more likely she had multiple profiles and forgot which one she used to look at mine.  
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But like you, as 90% of these are POT's who live too far away (more than 15 miles) or who live in a different country (or different continent!), I just ignore.  
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Life is good.
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The Cat

When a message is opened, if you click on the face icon at the top far right, you see most of the profile. What it does not include are any tags. Also if a pot did not fill out a section does not state "xyz" did not complete...., it's just blank.