Can a person have more than one account on qfeast?

It's possible. It's against the Qfeast rules, but it happens a lot.

It's possible yes.
You just need a different, but valid email, and make sure Qfeast isn't in your browsing history.
(If you wanna clear it, you can use private browsing mode, or go to settings and clear your browsing history from the beginning of time)