If you want to make it more popular and get more people, it has to be inclusive (even of fatties). But you CAN make checks in your app so that it is easier for thin people to find thin people. Such as: 1) Allowing people to filter by height/weight/BMI for FREE without having to pay anything!! (and make entering weight and height a requirement to make a profile) 2) Create a system where people have to verify each other as similar to their photos (e.g. once they agree to go on a date, they each get a computer generated code they can give each other when they meet, which they can then use to review/rate the other person's profile publically...e.g. "Had a wonderful date, Joan looks exactly like her photos!" or "Suffered through the date but beware, got fished by a fatty" reviews...1/5 stars!!) 3) Make search results filter via those who have been verified by other users, versus those who aren't. This will also encourage people to go on at least 1 date to get verified by their date. Make this verification expire after 3 months, so that people will have to go on another date to re-verify their likeness to their photo 4) Include people to upload 1 short 10 sec video of themselves to their profile, using your dating app/website to record the video (so they can't just grab a random video from youtube). Let people rate this video in terms of clarity (how clear the video is: if it's a hard-to-see up close video vs a far-away-and-i-can-see-their-entire-body-video), to encourage people to post full body videos of themselves.  OR  5) Let people categorize their photos as either "up close" OR "far away"/"full body"....and let people search/filter results by the categorization of profile pics. Lots of ways to give thin people the option of finding each other...you just have to make these search features free instead of P2P. You can look for other P2P avenues instead.