May be they could've had two seperate events happening along side one another, but from business point (promotion for Sonic movvie 3) it wouldn't be the best choice.
From a business point, it would be very ideal!
The way I see it, I believe the reason why the "objectives" of the Sonic Speed Sim event consist of mundane tasks is because "if Gamefam can't have your money, it will have your time!", so having two events simultaneously will mean players will have to commit twice as much time in the span of one or two weeks, depending on which event maybe extended.
I don't know if Gamefam has executive meetings with Sega, but I imagine they brag over how much "time players having fun" on Sonic Speed Sim they have, even if that time is just players doing chores for skins.
Not only that but Christmas is the most marketable time of year, it be foolish for them to miss out on it. Given how they barely did the minimum last year, felt like they did.
Yes, let's just enjoy it while it's still running.
True. Still big promotion.