Now they are forced to use one of these options.
Isnt this applies to every other site as well? You will only have the option to register with an email on all other site and everyone will most likely use their gmail account to register. Pretty much the same as duelbits
Well if you feel uncomfortable with using your real email account, You can always choose to create a throwaway gmail account and register with it. Things should be fine as long as you keep the password for the gmail acount. Literally less than 5 minutes to create a new email account and Im not sure how you see this as a problem.
They basically force you to take a Gmail account. If I have protonmail for example, I want to use that. We all know that Gmail can give a lot of problems with login.
There are much more user friendly accounts with less steps. I have never seen a casino that forces you to register with Gmail. It is ridiculous actually. Users should register with the E-mail address that they want.