They created a "micro" service level which is their new lowest level that is basically the free version but paid. It's actually really cheap and I was tempted to keep one of my free services on that just to have it but decided against it now that I have a Koyeb account.
Doesn't look like any of my "paid" stuff (this site) has been affected/effected (I can never remember which is the right one) by the change. Even the
https://nediscapp.herokuapp.com is still online thankfully.