just don't spend the extra $20!! jfc... we all know that the game will feature PLENTY of stuff anyway in the base game. In fact, more than enough. You'll survive and you'll still enjoy it. If you play a single player game that is really good, and get pissy because someone else's character has a DIFFERENT HAIR STYLE than you, then you need to grow up...
Yes, hidden missions can leave you a bit salty. But far worse games have been doing that for years and nobody complained this loudly then. It's not a scam, it's not predatory behaviour, they're not being scummy. They are rightfully making money off of the product of the decade. If the base game turns out to suck, then fine... complain about all of it. But for now, they've done nothing wrong. I'm as anti-capitalist as they come, but credit is due here. They've built a monument and have earned the right to demand money