I'm an Electrical Engineer
This is why I only play emulated games on mobile now. This model of game design is fundamentally bad. You should never punish the player for not spending enough money, but that’s exactly what these games exploit. Games like Pokemon would have an extremely bitter reception if you needed to pay $100 to catch Mew or something like that, but these games are slowly corrupting gaming so that this model is acceptable.
I had high hopes for gaming on mobile, but with the classic model of buying a $30-$40 game on a mobile platform seemingly going away, I fear that the future of mobile gaming won’t ever be as good as it was in the old Gameboy days.