We have no clue if F2P Destiny will be on Stadia at all.
Either way, not my point. You pay 3 Months for "Video Game Z That Came With Stadia Pro" and then cancel your sub, you lose access to that game on Stadia base.. because you are no longer making Google revenue. So why would you get UPlay+ w/ no revenue to Google on Stadia base?
If UPlay+ is available on Stadia base that's a HUGE WIN for Ubisoft, not Google. Don't get me wrong, I want it bad.. in fact I would probably sign up for UPlay+ in a heartbeat if it was on Stadia Base because it means I could check games out quickly without installing them or potentially play them when I'm traveling for work w/o bringing my gaming laptop, etc. As it stands, I'm still debating UPlay+. So like I said, big win for Ubisoft if Google gives them endless free Stadia Base servers for their users.