For such a simple app, it’s quite remarkable with regards to the kind of system they use, which is other users liking your photos, to create its own economy of likers and people who pay for likes. So if you’re a liker, you give likes to other likers, but more importantly, to people who pay for the likes. Given how cheap the likes are, I don’t see how anyone that owns a smartphone would not be able to afford a few dozen likes, which probably costs as much as a bowl of ramen. So in the economy, you’re better off being the buyer. Trust me, it’s worth swiping if you want a couple of likes for a single picture, but it’s 10x easier to just buy the likes and be done with it.