I first want to state that this is in no way concreate but a theory. Anyway my theory revolves around SCN and their invites. The invite sytem crashed a week or so ago. And they have yet to fix it and they have no eta on the when it will be fixed. So my theory is that they wished to close the invite system, without actually publicy revoking all invites. You may ask why would they do it this way. Well some people only leech and seed to get invites to trade. And with a public announcement that invites where being revoked alot of people would stop seeding there and start seeding else where to get invites. They figured just pretend the systems down so people would remain active.
My reasoning for my theory revolves around the fast that it shouldnt be to hard to fix the code.
This is just a theory, and I must admit I was up drinking when the idea came to me.