Both APIs you mention live off donations. This is not really feasible for the whole internet.
Furthermore, they still apply rate limiting and such to not be abused. What if I want to run a service that puts heavy load on the that api but am ready to pay for it?
IP based rate limiting is a primitive technique compared to what Nostr offers.
If you want curated data sustainably you will need authentication and you are better off with a paid service beyond a threshold for sure.
If on the other hand some successful service goes rogue you will have much better guarantees to fork that service and jailbreak the data, if it uses signed and standardized Nostr events.
Otherwise your left with unverifiable data that only makes sense in a proprietary format that no one else uses.
