But then what's to stop one bad owner from just making 15 different accounts for their 15 different properties?
And from the users perspective, there's reasons to prefer that all the properties under the same owner are tied to the same account. If bad reviews are happening it's easier to see the pattern if all the properties on the account have bad reviews.
Not that I don't generally agree with you, I just think that it's a complicated enough issue that just limiting the number of listings per person won't totally solve.
If this actually did lead to faster matrix multiplication, then essentially anything that can be done on a GPU would benefit. That definitely could include games, and physics models, along with a bunch of other applications (and yes, also AI stuff).
I'm sure the papers authors know all of that, but somehow along the line the article just became"faster and better AI"