I still post on megapersonals (which I believe posts to Listcrawler, escort Babylon etc I think they are all tied together some how) due to the fact that it is free to post there vs other sites where it's $50-$200 to post your ad.
I've gotten a few amazing clients off there but its very few and far between - I've realized its A LOT of time wasters, pic/address collectors/broke guys wanting free or cheap play.
Its super frustrating sometimes but like I said there has been a few amazing clients I've gained from those sites... Once I know they saw my ad on one of the sites above I always reccommend they try tryst or oh2 or one of the more serious sites because I've looked at some of the other ads on there and they seem fake as f*ck