Why this forum deletes full threads ?

perhaps because you raised some sensitive issues related to someone who‘s products are heavily advertised on Audiogon

Perhaps that particular ‘Someone”had a hand in that deletion 😜

Because it’s their forum/place of (unregulated) business and they can delete whatever they want. Or OPs can delete their own threads anytime normally anytime they want. Best to ask the only people who could give you an answer if needed ie the moderators, if desired, but I would expect they are under no obligation to explain such things to anyone if they choose not to. It’s a free forum that serves a business purpose so consider using it a privilege not a right.

Because some of them are basically crap?

Think I may have posted to that thread...

so, perhaps I am partially responsible for its deletion (if my post(s) didn't pass the crap test).

I've been posting here for 20+ years (search for my early posts - same moniker) and A'Gon has gone through several forum cleansing acts, including shutting down the forums @ one point as far as I recall and to the best of my knowledge.

Shills have always been active here, as they have been in most/all of the audio forums I've frequented over the past 20+ years.

I've found forum moderation here (A'Gon) to be quite moderate in comparison to other forums.

It's their private site and "freedom of speech" does not apply - period.

A'Gon and DIY Audio are currently my favorite Audio chatrooms.

Used to really like Audioasylum, but burned my bridge there due to political and morality issues I had with the owner and one of his moderators.

One of the mods @ Audioasylum refused to remove unsavory posts about usage of a DateRape drug and even "chuckled" @ those posts.

DeKay