The model was open for any researcher simply by applying; you had to enter your name, university or group affiliation, write like one sentence about your prior

The model was open for any researcher simply by applying; you had to enter your name, university or group affiliation, write like one sentence about your prior work or publications, agree to the noncommercial research only license, and that was it. They don't say how many people got to download the weights via this method but it was probably in the thousands. And the weight files weren't watermarked/fingerprinted or anything. The hashes were all the same. Therefore no real way to trace who put up the torrents first. So this isn't much of a 'leak' as it is... just good old piracy. Like if you found a torrent of a DVD rip of the movie Frozen, the MPAA wouldn't be blaming Disney for 'leaking' it.