Companies regularly do things that are detrimental to their bottom line because they either misunderstood how their customers use their product, or because they are trying to please shareholders, or a combination of both.
The question begging to be asked here is whether those are new subscribers or people that were using someone's else password, natural growth, or just a good show landed in meantime and a bunch of people subscribed
It's an increasingly crowded market, everyone's distracted, everyone's sick of subscriptions, and nobody has enough money. If I was going to alienate a major chunk of my userbase, this would not have been the time I would've picked.
It does seem like this was a plan that was in the works for a couple years, and momentum is keeping it moving. I doubt they would have picked this timing if they knew what was coming!
They've initialized this crackdown in a few different waves. I can't imagine they would continue to do it if it were detrimental to their bottom line.