I just noticed it myself...
If a site wants to encourage membership upgrades, they should offer new and exciting options, not take away options we have had all along.
As for the change it doesn't bother me because if I want to look just look at naked pictures there's plenty of free porn out there. However I think it kind of sucks. Especially since last time they made a change like that they at least were nice enough to grandfather people in that were long time members. Who knows perhaps it was just a sly way of getting rid of that privilege.
On the upside of it though I can see it helping to fixing two big issues that seem to happen here in regard to pictures:
1. rude people bashing other peoples nude pics.
2. scammers sending out other user's pics as their own.
I don't really see those two things happening enough though to warrant the changes but its always nice to have a positive side to things.