I do not know the way you are searching for posts (and do not share your method) but I was wondering how I am visible in Google and it shows only one thread with my name in the past month.
And then I checked my default search engine DuckDuckGo in the same way and it shows full page of threads. It's a kind of surprise for me. :o
First I see if I have any chat history with you to see if you've ever been granted a key. If so, I tend to be more lenient when checking. Then I search the general discussion forum for your username, and click on whatever threads to find out if you've actually posted or if your name was just mentioned or quoted a lot. If I'm still unsure if you're eligible, I search google for the following: "site.gog.com [username]". I then sort by date for posts from the past month. I see tons of results for your username on the forum, and 10+ total pages of results on Google. Only one result in the past month on Google, but quite a few by searching the forum, and you've been eligible in the past, so I'd declare you to be eligible.