It seems that some people are reporting that they got 2,000 points for the community and some 1,000.
I'd like to offer a hypothesis:
When the promo came out, it seems there was confusion if you would get the points for just signing up or for 3 posts.
I think it was for both; 1K for signing up, and 1K for participating.
They used two different languages when giving the bonus points:
"TrueBlue Community Signup Bonus" I got on 9/30 and
"TrueBlue Community Participation Bonus" I got on 10/08