And before you raise the hypothetical question of additional tiers in future, by that kind of logic people shouldn't make any recurring purchase of anything since in future terms might change.
It's just like cable TV. They promised that a subscription to cable TV would mean no ads. They lied, and went back on their promise within a very short time.
They'll do the same here.
20 years ago, you'd be right. This argument would be paranoid nonsense. But that's not the world we live in.
We live in a world where your car manufacturer wants you to pay monthly for heated seats. Today it's normal for hardware you bought outright only works if you pay rent to someone else, and services like Netflix reduce features and increase the price. Amazon can, at any moment, delete books from your kindle that you already paid for. Digital rent extraction is a huge part of how the tech industry operates today.
Yes, you should avoid subscriptions where you can, because there is a real risk that they'll change the rules to take away what you paid for down the line.
And especially don't trust the advertising company to not put ads in their paid tiers down the line.
People don't want to pay for subscriptions because everything has become a bait and switch with infinite tiers!
Whether it's the local newspaper, or a mega-tech company's corporate offerings.
I tried subscribing (online) to my hometown newspaper within the last year. And a major national news publication.
You know how people say (or used to) that the garbage on the internet is the fault of the public for not being willing to pay for good journalism.
Well, guess what? You pay, you're just a sucker, probably senile and out of touch, so every third thing you click on is still behind a pay wall in the hopes you'll upgrade.
And, you know, it's being done to big dumb corporations with all the software-as-a-service offerings, and they're sucking up your tax dollars from government the same way. I don't want to name names, but the entire game seems to be slicing up features randomly and making up excuses to charge more for almost every one.