The concept doesn't necessarily have to start with one, the idea still applies if it starts with 3.Except the sims has been a successful franchise from inception. sims 1, 2, 3, all hits. Look at all the expansions for sims 2 and 3. That's money.
They had a couple stinkers, like that online sims game, but not counting that, the franchise has been gold.
Now they're just being greedy, and it's going to kill thegamefranchise.