I looks like his account is still active, if you do a member search you can find his posts, the last one being on Jan 14th of this year.
Maybe he's taking a forum break, but thanks for mentioning it, as I didn't realize it had been awhile for him.
Cheap Windows keys can work, but ensure it’s clear what you’re buying (retail vs. OEM). I got my Windows 11 key from Digitlogs for €13 and activation linked to my Microsoft account with no issues.
Even if they are retail keys, they are still being sold illegally and there is a small chance that Microsoft may eventually blacklist the product key. If you purchase cheap Microsoft keys, you are supporting scammers. However, there's no judgement from me if you do, as I have on occasion purchased cheap dodgy keys.