also people create hosting just for curious, you cant force someone to use my hosting, they have their choice, maybe they will comeback, maybe not

Well officially, iFastNet is called "I Fastnet Limited". Well stick with the "eve they dont know.". However, you should be consistent across your page, and iFastNet does look the best.

Well he collects the email, but doesnt verify it. But yes, this will be a big factor as to why this happens:  

That is going to be a cesspool of spam and illegal activity with little way to connect multiple accounts together. Also, iFN requires an email, so you need to collect one. 

Thats a bad idea. Also, thanks to the "username" this will be quite confusing for the user without a dedicated panel.