Nope, at no point has any of the arrangement been exclusive, else MS would've successfully manipulated them once again, HERE is now a central part of their strategy going forward, they need to monetise as much as possible, & they need absolute flexibility for that. I've been following all the developments surrounding Nokia's future regularly/obsessively(?) @MNB, & there's been absolutely no hint that MS has it's tentacles on some kind of "exclusive arrangement", touch-wood.
I just got in and I can see a clear reference to .... HERE!!! if you look at terms and conditions of the jolla harbour, then you can see for instance at the end (in the restriction part) a lot of mentions to HERE services, HERE Positioning services... that is good news for me