[skymt]

Edge defaults to Bing for searches, which is a direct source of revenue via ads. Edge also uses browser history for ad targeting via the "personalize your web experience" option; I don't recall whether that's enabled by default but I'd expect it is. On top of those there's a price-comparison feature (affiliate revenue) and a Pinterest partnership.

[delusional]

No more than a year ago the little "help" icon in explorer linked to bing with a prefilled search query that didn't even include a guard to make sure only microsoft.com results were returned (that has since been fixed). The results were (predictably) full of blog spam.

Microsoft was deliberately showing blog spam, just to route users to bing. I can't understand how that's a good business model.