You can go to: dashboard/users/groups/ in your site and create a group those people will be assigned to and then remove them from that group after a certain amount of time or after a certain number of days.

steve

Hi Steve,
Thanks for your reply. I've looked into that. But if I have a lot of paid subcribers and they can choose monthly or yearly subscription, I would want to be able to give them viewing permission according to their join date. Grouoping them into groups cannot give them exactly 30days for monthly members and 365 days for yearly members.
I suspect I may need to keep an expiry date per member and suspend the account on due date by running a daily account maintenance routine. This may involve changing C5 codes which I am not capable of doing. Plus there is concern about upward compatibility with new C5 releases. Any better option from anyone? Any C5 freelance developer interested in this job? Please let me know. Thanks.

There's this block in the marketplace.http://www.concrete5.org/marketplace/addons/i-belong-the-paid-membe...
You night want to ask him about asking the extra details to this if you use the eCommerce from concrete5.

steve

Thank you Steve, I will check it out.