However if this turns out to be a new evolution in the case of ISP's shifting into game distribution, this list may need to be reworked at a future point, indeed the entire nature of game distribution/publishing may become a great deal more complicated.
Didn't mobile carriers attempt this during the J2ME era? (and in fact, still keep doing it in some countries) I mention that because they're probably similar enough to ISPs in that both offer a service to a network, especially these days that practically all cellphones can connect to internet (so in a sense carriers already double as ISPs, albeit somewhat specialized ones).
Of course this case could be just the ISP branching into unrelated services just as a way to expand its business and is probably also involved in other stuff (not uncommon from many companies - I mean, does anybody know that Sony is in the insurance business, and that it's their most profitable branch actually?)