Re: not much of an "upgrade"
Many people in the UK get a Flickr Pro account because they BT Internet clients. Me for example. No word on the email about that and nothing from BT so far. Being a very very light user of Flickr whatever the changes are behind the scenes probably won't have a great effect on me but may for others. Presumably at some point BT Yahoo will provide a pointer for us - I assume the easiest thing would somply be to move to the ad free 1Tb version that would suffice for most people. So the benefit of the freebies notionally increases to $50.
On the other hand if people ar throwing high res images and videos into the storage 1Tb, for a heavy user, may not be much. I certainly have more than that at home, though I can;t imagine wanting to load the entire "library" to Flickr. Especially at the connection speeds typically available.
I would guess that the business modelling suggests that the deal will far exceed the expectations of the majority of users and the loss of a few high volume users, should that occur, will have little if any negative impact. It might even be positive fo rthe bottom line.
Having had a brief look at the new format it seems to be another "me too" mishmash that lands you somewhere interesting if you are inquisitve but not necessarily where you want to be. I suppose one can control that. I will try to gather some enthusiasm for going searching for what it can do for me.