VintagePunk
Blue Crack Distributor
Based on your post, only the strong-already-with-a-fairly-strong-fanbase-stronghold-in-pop-music survive
Maybe that's why they do well opening at U2 shows, because they're known and have a wider fanbase. And maybe they have a wider fanbase because they have wider appeal.
I think that Interpol is more of a niche band, and it's not surprising that they didn't capture the crowd's attention in a stadium setting. And that's perfectly fine, doesn't invalidate their music any, just means that they're going to have a smaller fanbase, and are unlikely to get a stadium crowd going.