So is Cloudflare
I'm not so sure about Backblaze. I don't even think they're the biggest player in that space (AWS is, I would guess). I would guess most people could migrate off if Backblaze turned south.
I think the platform has a ton of potential and it already shows signs of real progress, but much like fly.io, its rough edges are incredibly rough.
Akamai doesn't look like the kind of company that wants to deal with 3,000,000 tiny accounts, and I don't think the customers will be happy with the service they get.
I guess to put it another way, do you use Cloudflare currently? If they made the free tier $5-$10/month for as many sites as you want, would you pay them or put in the effort to migrate?
I think I've got 2 sites I actually care about enough to want a CDN and DDoS protection. I would probably just pay up. I'm sure I could go somewhere else for free, but my Cloudflare setup works and I don't want to have to redo my Let's Encrypt wildcard.
If qoq and yoy revenue keeps going up, and cost of revenue stays the same or decreases (as a percentage) in the same time period, it makes sense to spend the bank account on growth. If the growth stops, that's when you start cutting expenses like R&D and operations to get the profit. Reasoning being: getting x% of a bigger revenue is better than getting x% of a smaller revenue.