Heroku deleted an entire (paying) account out of the blue bringing the apps down
twitter.comTIL https://render.com/ competes with Heroku and still offers a free plan https://render.com/pricing
Yep, the victim promptly migrated. Another good alternative is fly.io, or even DigitalOcean with Dokku (no free tier here tho, but it can be as cheap as $5/month)