Horse rescue standing a stallion, your thoughts?

Curious about what people think of a nonprofit horse rescue also standing a stallion? I feel off in some sort of way about it but not sure why. Stallion is okay quality standing cheaply (mid 3 figures, very low for the breed) to any mare registered or not. I don't know a lot about breeding so not sure if that's done. What do you all think?

Update to answer some questions:

The rescue came first, from what I know they were involved with a current large rescue in the state and branched off on their own. The rescue has been going for a few years, but they just bought the stallion, he wasn't a rescue as far as I know, I saw his sales ad not long ago. He's standing for $700 for the first 25 mares this year that breed to him and then goes double to that. Is that a lot of horses to breed to in a year? I've never really dealt with that before. Their breeding contract is posted on the rescue site which is how I saw the information. I had not yet donated much to them, just helped a friend with some meds for one she was temporarily fostering and when he went back to the rescue I told her to send it with the horse, so just a couple tubes of Tomorrow.

It could be separate as far as the breeding and the rescue, but it looks muddled and unclear on their social media and website, which is why I was just curious what other peoples thoughts were. I've just not seen this before.