A bit relevant: a few years back I grabbed one of the Baen freebies, but now the only sign I can find of it on the site is
this.
Since Baen uses a consistent url scheme, I was able to dig up the original page on the
Wayback Machine. It seems to have disappeared sometime in 2020.
Considering that the
other example, the Heinlein novel, was simply marked as "not available" and the page left up, I find this curious.