Right now it's just Free Software that you install on your own server. Any pricing involved (for normal users) had only ever been a high storage space account on Oasis, a sort of example server that was run by Kenton, the original creator of Sandstorm. However Oasis is basically shut down now, because really the whole point is self-hosting anyway. (I say "for normal users" only because there was once a business plan involving potentially getting companies to pay for premium services, iirc)
Nowadays it's a community project, still getting security updates from Kenton. Spinning out some sort of non-profit funding situation, probably unaffiliated with the initial company, is plausible. Right now it's all speculative though, which is why you won't see anything about it on the site.
Sandstorm was (maybe technically still is?) a company with a business plan. However that's effectively been disbanded. From 2017: https://sandstorm.io/news/2017-02-06-sandstorm-returning-to-...
Nowadays it's a community project, still getting security updates from Kenton. Spinning out some sort of non-profit funding situation, probably unaffiliated with the initial company, is plausible. Right now it's all speculative though, which is why you won't see anything about it on the site.