I second making a very generous free tier, and then charging reasonably for more requests in wide buckets.
As a user, free or paid, it'd give me a lot more faith in this living past tomorrow.
As a user, free or paid, it'd give me a lot more faith in this living past tomorrow.
And the risk of this project is largely mitigated by offering the full repo as open-source, so you can always self host this if needed.
The latter should be easier to manage with more predictable traffic, while giving you more leeway to deal with abuse on the free servers if it ever becomes an issue.