One concern for you about pricing. If I stick a varnish cache or cloudflare in front of my site (or your api), I’m unlikely to need a big plan. Free plan could do for a very popular site.
Maybe consider pricing by amount of content and requests?
Maybe consider pricing by amount of content and requests?
That said if someone wanted to get real fancy they could comb through the content and replace the image URLs with some of their own. You are right, this will have to be sorted out if this becomes a common way people use the product.
Thank you for the feedback
I don't think anyone would "could comb through the content and replace the image URLs" to save a few dollars, as the development effort would far outweigh the cost savings. So maybe you are OK there.