Quote - Does anyone know if this can be used as a pay as you go type of deal.

I doubt it, that would generate much less income for Adobe. I reckon a big reason for the whole shift to subscription is that when times are hard a lot of people just stop buying upgrades, the old version still does the job even if it doesn't have the new bells and whistles.

The trouble is that there's a disincentive to upgrade after that, once you've missed one upgrade, you have to buy a full new licence, a significant outlay. So users like me just keep going with software several versions old (I'm still using CS3). Consequently Adobe hasn't seen a cent of my money since about 2006. I'm sure they want to change that with the subscription system.