Just like Vercel and Render, thus many folks will get started there instead of having to deal with giving a credit card to the usual hyperscalers.

We have done prototypes of distributed systems based on SaaS products with such kind of accounts, and when proven to work, it is much easier to get the buy-in for the credit card, than starting with asking for money first delivery later.

That is not a great comparison. If you compare bandwidth prices from all places Cloudflare comes at the very bottom and Vercel/Render at the very top.