I didnt hear about epay.com but when i do tried to visit the site i saw that its a web wallet and at the same time as an exchanger which is somehow a common thing on this cryptomarket i dont know if this is trust worthy or not and going back to the bonus $50 usd for it sounds too good to be true i dont think they would really give such thing because people might really abuse it. I would try to create an account and lets see what happens. Ill update once i have tried out already.