1) It's a comparison operator. For instance, choosing the following options
Points for Posts
>=
500
You are creating a criteria that returns true if the user has 500 or more points from posting.

2) This will be addressed in Intergration issue with activities and Post Thanks - neither are working - cross-posting questions makes it very difficult for me to keep up with it


To make sure each issue is only addressed once, I'll close this ticket