I will use the Free Trial option in the pro site, but I have some doubts:
1) What happen with the site when the free trial period finish and the user does not pay the pro level? Is it automatically removed? In how many days?
2) What happen when the user pay a pro level? Will he receive a notification email to pay the pro site each month?
3) What happen if the user does not pay the site for a month? Is the site automatically blocked?
4) And if the user does not pay the site for several months? After how many unpaid months the site is removed?