There’s complex dynamics at play when offering services to consumers that aren’t necessarily reflected in the numbers. For example, Netflix may believe they’ve reached a point where an advertisement-supported plan won’t cannibalise their higher value subscriptions and therefore now is the right time to do this when maybe it wasn’t right a few years ago.
Consumer behaviour is constantly changing, companies have to keep up with it (and even anticipate it) lest they fall out of favour.
I'm sure smarter people than me have found this model worse than what's already used, I just hate ads and was surprised at the low value they seem to generate. And all those ad-supported users must generate plenty of streams that means payments to the record companies.
They do this for free users on mobile.
Even if they lost money per free account, it’s worth it.
So their strategy doesn’t seem to be doing to well.
How much does each of those ad-supported users cost each month? Those 295 million users account for as much revenue as 34 million premium users, but they probably cost a lot, not to mention that the ad sales and ad infrastructure isn't free either.