ProxyImg
proxyimg.comDoesn’t mention what the business model is, so presumably this has to do with tracking people for advertising?
$25 for 1000 requests, seems like a clear business model to me https://proxyimg.com/pricing
edit: ok, I see, on mobile version the link to the pricing is hard to find.
I am on mobile, yes, well deduced.
So serving images themselves is free, but the API to control those images is not.
ProxyImg help businesses optimize, resize, transform, host, and deliver images faster for mobile and website applications. Our free secure proxy services safeguard your images while ensuring worldwide distribution at high speeds and reduced bandwidth costs through our efficient CDN, boosting your digital reach and SEO performance.