Sooooooo. Been taping since 1982. Long ago I decided I was not only doing this for myself, but "for the record", as an archivist, so to speak. I have recorded a few bands where open taping was so prolific, might as well only share if it is excellent quality- Phish, WP, GD, etc. OTH, they have uploaded 100% of my GD AUD recordings to archive.org. but none of my WP since they just recently became OK to post on the TS portion. Discussions with archivists for LMA, Matt Vernon, Vanark, Greenone almost to a person say, as long as it is unique, different gear, no other tapers, etc, might as well post it if the band allows archive.org posting.
To your question about keeping it from being sold. Ugh, so difficult. I am aware of many of my masters being available on guitars101 for one instance. That is basically a whaddyougonando situation.
If you are not the one doing the selling, the karma is on those folks.
What I've been doing is hosting current non archive bands on my google drive and use an e-mail list of interested people I've cultivated over the years (over 75 now).
Some people use hightail as their hosting service. I get a weekly e-mail from this guy who lists 10-20 links each posting. This only goes to people he knows, in fact, it just started showing up in my inbox without me asking!
I've seen several TS tapers stuff listed on there.
I hope this helps. And while I feel sharing the music is the important thing, each of us has our own comfort level, and possibly other professional interests which understandably prevent us from sharing.