I just got the ability to post to forums. What triggered it?

'just'

I could assume that your previous attempt that failed was close to your above success

How long since you registered on 2018-09-09 to you first success time and last fail time could give a clue as too trigger timeout

range maybe 17 days +- 1 day      contains 400 hours

its some requirement that involves account age as well as number of games played afaik. Dont know the numbers.

The FAQ http://www.edcollins.com/golem/ says about 10 games, you seem to have hit your 15th game…