Any popup of "decentralized AI" or "bitcoin AI" is a scam. Why? Because if someone started building it, he would certainly have to rely on centralized datasources, servers, pretrained models, etc. Storage space is usually so extensive, you cannot store on blockchain. That's just one chunk of the problem still. Then, how do you execute your AI software? How do you retrain your model? Redeploy terrabytes on the blockchain for millions of dollars every day?

What you see as AI are usually ICO scam networks deploying some shitcoin as ERC20, throwing in some fancy words and harvesting money from dumb investors. Then disappearing in a snap.