I'm considering using GF to implement a classified ads service where people can request or offer tickets to an event.
I've got a few specific needs/wants, and I'm not sure whether GF will work.
1. I want to be able to invite specific users. I know there are some invitation plugins for WP, and am wondering if GF will play nice with them, or somehow support this directly. Invitations would be validated through one-time codes or the user's e-mail address. This needs to cover hundreds of people, so hand-validating won't work.
2. Invited users would get "gold star" status when they register. This would let their ads run longer before expiring, visually highlight them, and sort them above other ads. I can imagine various ways this might be implemented (user roles, different form types, etc).
3. Send renewal-reminder e-mails before ads expire.
Thanks in advance.