I read the article and I still don’t really understand what this is.

It was so nice of you to say that in the post.

So now the developer gets nothing in return for creating the app?

The vast majority of people?

The problem comes when it costs you money to send an SMS or make a voice call to the person with iMessage but data has no extra monetary cost, for example when you’re in a different country.

Only iPhones can use iMessage. iMessage uses a data connection rather than SMS or calling. OP lives in a different country and international SMS or calling would cost a lot of money, but a data connection does not. The only way of communicating with certain people without incurring extra charges is for OP to use iMessage over a data connection.

300-500 of what currency?

250-350 of what currency?

A picture of some kids using phones.

I don’t believe that for a second.

Do they count it against the app id and not the user?

Yes, that.

Because Relay has a few thousand users.

Discord notifications have never worked for me on Android.

Their first sentence says it’s already disabled.

There’s also two copies of the system partition so you can reboot into an upgrade (or revert back from one). So that’s half the space.