I do not understand why would a developer (or development team) change the licensing terms of their software for something stricter, like Redis did. Could someone tell me what the factors are?

If you don't pay for WinRAR, the only thing it will do is show up notices to buy it. This is intentional, meant to prevent piracy. So it's more like a donation rather than a purchase.

This just goes to show you that Google will do anything for money.

Only those energy drinks that have artificially added caffeine or taurine are going to have their sales restricted to those over 18.

The API pricing was imposed to crack down on free training of LLMs with user data.

There were also other API changes like totally removing access to content marked as mature. I don't know if subreddits can disable setting a post as mature because automods can't detect it or see its content.

Pokémon FireRed