@theemon: Think you shouldn’t be that afraid. Most customers don’t need support after the 1st half year. So there will hopefully not be a lot of discussion.
@TenserD: I see that a bit different. Those products are evaluating, changing. Maybe an author looses his interest in it, faulty updates are published and bugs are not fixed a.s.o.
A customer must have the possibility to rate again or to change his former rating. It’s fair to all the other potential buyers.
I’m not sure if my sentences are understandable, sometimes it#s a bit difficult for me to discuss stuff like that in english. 