Ummm, because everyone else is going this route...
The game subscription service landscape welcomed another significant player today as Ubisoft launched Uplay+, which offers PC gamers more than 100 Ubisoft games for $15 USD a month. Among the service's biggest selling points is access to the premium versions of new Ubisoft games like Watch Dogs: Legion and Tom Clancy's Ghost Recon: Breakpoint on the day they launch.