Sure, Blizzard does this a lot with their games. The idea behind it is more that it prevents whales, destroying the business model... the kids spending $100/mo

Sure, Blizzard does this a lot with their games. The idea behind it is more that it prevents whales, destroying the business model... the kids spending $100/mo are nothing compared to the people who spend literally tens of thousands of dollars on these games every month. That's who they're targeting.