As an ugly person I have a higher chance of scoring a date with someone attractive using this photoless site than I would have otherwise. Seems like a win.
You're assuming attractive people would use this site in the first place. At the very least, I'd expect the attractive to ugly ratio to look quite different on this site compared to other dating sites.
You're assuming attractive people just all want to be drooled at. Maybe they care about personality and are looking for a deeper relationship. In that case, putting up a profile pic is just going to gain them unwanted attention that doesn't further their goals.