I don't know if this is a recent policy change, but it is not the complete amount but only 50% of the remaining annual amount as per their website[1].
If it were something involving physical goods or services I can understand, but 50% penalty is still a crazy amount for a hosted software service.
Furthermore, it's going to cost Adobe a minimum of $1500 to even bring the case to arbitration, and probably $15k more in legal fees to actually win.
So yes, it's actually a difficult battle for Adobe to win and the costs will be much higher than the payout.
Adobe knows this. It’s a numbers game; if they have an honest monthly subscription and someone cancels, they get nothing.
If they have this scammy subscription and they collect 50% of the remainder for 50% of people, it’s like a free 25% (of the remaining “annual” term).