If a user selects that they are interested in going pro in signup, they cannot use their admin until

I've just added a test user and a test site, and clicked the I'm interested section in the new site creation.

It takes the user to the prices, but if they decide not to purchase at that time, whenever they click a section in the admin, it takes them back to the prices.

A user may be interested, but decide not to do it at that time.