It's your activity, so I'm fine with whatever you decide. You have put a lot of work and time into this and it shows!

For the 500 character minimum, you're talking about reviews, right? I receive a lot of shorter ones, but almost all the ones I send are longer. So for me, it's fine. Others might want it lower though.

I personally like things simple but it's not that hard to check word count on blog posts and the extra points for longer ones are nice.

It'd be great if we received points for donating to charity auctions here. Though I imagine the points should be earned on the day that the things are given, not when pledged?

I'll post to this thread as I think of other things.