The number of downloads really doesn't seem like a good way to measure the quality of a bit of work. One download could be deployed on a bit website and classify billions of users images.
The jersetters are basically exempted from the strict laws because they bring in money.
(I know they must have used a VPN for training but it does seem like an added hoop. OFC the UAE's block is also not particularly thorough.)
You'd assume such models would do better in a laissez-faire nsfw environment than in a walled garden of relatively-less sin.