>Surely there's an option to unsubscribe from marketing emails. Did you try? It's highly illegal not to have that.
IIRC, agreeing to receive marketing emails was one of the terms of installing the app which was required to use the tickets.
No matter. I just corralled that spam in a folder and ignored them (which is how I knew how many -- >100 -- I received) for the couple of months I had the app installed.
Once I attended the game, I uninstalled the app and told my mail server to reject any emails (with a permanent/"User Unknown" rejection error) to that email address and deleted the folder.
I probably should have filed suit against MLB for coercive licensing of their app. Which would likely be finishing up around now, seven or so years and tens (if not hundreds) of thousands of dollars in lawyer fees later, so the court can tell me that I have no legal recourse.
But I didn't. Mostly, I'm sure, because I don't have your keen legal mind. Why don't you try that and let me know how it works out for you. The actuarials say I should live another fifteen or twenty years, so I can wait. Do tell.