And now you understand the business model for “in-app purchases” software.

C’mon guys, seriously. Nordeus is out to make a profit, just like every other company.
Users who consume services without paying are simply not as valuable as customers as those who do pay.
If enough users get ticked off and leave, they might change their minds a bit (don’t hold your breath waiting for that).

But an alternative might be to form leagues exclusively for users who want to play the app for free only.
Other software companies do create such environments while reserving premium features for paying customers.