I'm in the camp of "this seems fair", though with the caveat that I would prefer it if they only charged you the total discount you received. e.g. if monthly i

I'm in the camp of "this seems fair", though with the caveat that I would prefer it if they only charged you the total discount you received. e.g. if monthly is $10 and yearly/m is $8, and I decide to cancel after only 7 months, Adobe should just charge me $14 ($2*7).