That is absolutely bizarre: http://seraphicdesign.livejournal.com/

I mean, how can these sites not notice this going on?

BTW, another reason "download 750 images a month" is ridiculous.

Do the sites check or even care?

why would they? the subscriptions expire the same whoever is clicking. the only reason they might be alerted is that they were always banking on buyers using a lot less than the full capacity of the sub, but you can't tell that to the people can you? especially the contributors. for ppl like ss contributors, this might even be good, more dl's.