And what do you suggest replaces it? Developers don’t offer subscriptions because they are greedy. They offer them because it’s the best way to have a sustainable software business.

Charge for new features like traditional software did. Subscription software is literally rent-seeking... pay forever or your stuff stops working.

If the developer is actually continuing development, new releases that are worth paying for will happen.

But it's not a software, it's a service that depends on a server farm, and a constantly evolving set of hundreds of third-party integrations.

It literally will break if left unmaintained if not funded properly, unlike a traditional software.

I do agree with other subscription-based models that sells software like Adobe Creative Cloud, where I'd be perfectly okay with having a non-updating version for a fixed cost.

If IFTTT was software that ran on your own hardware, I could see your argument. But they are not.

It's usually product/marketing offering subscriptions, not developers. And unfortunately they are usually motivated by greed.