First, you can only like a few people a day, unless you invite friends to join the app, an obvious attempt at getting more users.
For instance, this person's profile uses terminology and size preference usually associated with fat fetishes: No one is judging people with a fat preference; however, the point of this app is for people to find a relationship, not to be fetishized.
There are plenty other sites and apps for people who share the fetish.
My weight has fluctuated dramatically throughout my life – I was a fat child, a thin teenager, a chubby sixth former, a skinny student and so on, up and down through my adult life.
I’ve never bought into the lie, popular with some elements of the media, that everything will be better when you’re thin.
It appears the developers are working hard to make sure its users are treated with fairness and respect.