Sheeran sings the hook on a ton of rap/ hiphop songs and both are basically pop music artists.

There is definitely an over lap between people who listen to Ed Sheeran and bump thrift shop.

That's never stopped a concert gig before. Evanescence shouldn't have toured with Korn all the time, but they sure as shit did it successfully.

i have never had any interest in seeing Ed Sheeran. Would be very interested in seeing Macklemore

So, to me, its weird that Macklemore was only an opening act. I suspect many people could name more Macklemore songs than Ed Sheeran ones, and I definitely hear macklemore on the radio more (on all stations) here in Australia

They’ve done more than a few songs together. I don’t really follow either artist but they’ve been collaborating for over ten years now