If it's not too much of a bummer question, what tends to be the outcome for mustangs like the ones you post? Do they get passed on to sanctuaries all that often, or is that usually just the ones that have some preexisting fame?
It's a good question! I can tell you that since 1971, the BLM has adopted out over 290,000 mustangs and burros. For reference, in fiscal year 2023, the nationwide population estimate was 82,883 wild horses and burros.
In 2023:
Total removed: 5,335
Total placed into private care (adoptions, sales, transfers): 8,045
Total fertility control treatments: 720
There's a good number of sanctuaries out there, and some take only famous horses. Some take older horses or horses that have a hard time adjusting to domestic life.
However, horses that aren't adopted (after three tries) or sold as sale authority (no title, only $25), aren't forfeit. They move to off-range holding:
"All off-range (unadopted or unsold) wild horses and burros, like those roaming Western public rangelands, are protected by the BLM under the 1971 Wild Free-Roaming Horses and Burros Act, as amended. These off-range horses and burros are fed and cared for in either off-range corrals or pastures. The BLM maintains a monthly holding facilities report...The total capacity of all BLM off-range holding facilities is 82,567 animals."
As of April 2024, there are 63,028 burros and horses in public and private off range holding.