For me, it's the principal of the thing. It's not that it's such a terrible thing for a company to know my email address (especially when apple makes it trivial to create throwaway ones for your iCloud account, their "hide my email" feature has improved so that now you can just make bespoke randomly generated email addresses that look exactly like an unassuming iCloud account, but forward to yours.)
The reason I do this is because I am so fundamentally against the concept of a gaming company harvesting personal information about its users, that I feel like a shitty person for being complicit in it. I'd rather miss out on the occasional good game than be "part of the problem".
The reason I do this is because I am so fundamentally against the concept of a gaming company harvesting personal information about its users, that I feel like a shitty person for being complicit in it. I'd rather miss out on the occasional good game than be "part of the problem".