Found some answers re: the WotC call for old books etc:
So it was 2016 that WotC asked for scans- that's what I was thinking of. There are some links to old WotC/DMsGuild URLs that are sadly dead.
Previously, it looks like Paizo was selling digital PDFs of oldies in 2005. They were of questionable quality.
It looks like other folk found a couple other bits above.
Side note, WotC used to have a bunch of TSR stuff up for free. Unfortunately this particular treasure trove is dead.
So it was 2016 that WotC asked for scans- that's what I was thinking of. There are some links to old WotC/DMsGuild URLs that are sadly dead.
Previously, it looks like Paizo was selling digital PDFs of oldies in 2005. They were of questionable quality.
It looks like other folk found a couple other bits above.
Side note, WotC used to have a bunch of TSR stuff up for free. Unfortunately this particular treasure trove is dead.