I hate services that don't put a price on things like bandwidth (because there's always a price!). So we priced bandwidth and made it transparent. You can put an app on Fly.io and server petabytes of data every month, if you want. We'll never complain that you're serving the wrong content type.
But the reality is – having an unlimited bandwidth promise is perfect for for a fire and forget blog site. We're not doing ourselves any favors with scary pricing for that kind of app.
If I can't have that, then I just can't take the risk of my site getting hammered (by attackers, getting linked on HN, whatever) and racking up some kind of bill I can't pay. I realize the chances of that are small but that's scary.
I realize that, obviously, "stay up at all costs" is what a business needs and that's where the money is. Fly.io won't get rich off of personal projects. But, I do think they serve to get developers onto the platform.
Your bandwidth allocations and rates seem very fair and generous, btw. I do really want to check out your platform.