I don't understand why we keep going back to this same argument over and over again. Sugarcube, aside from your own assumption that Coldplay "chooses" to play arena gigs above stadium gigs in the U.S., what exactly is your proof that they care more? To me, a band that cares about their fans doesn't charge them $100+ per ticket for crappy floor seats where you're far away from the stage. A band that cares about their fans doesn't make an album that is a blatant attempt to get number 1 hits through producing crap that sounds just like all of the pop songs on radio, as Mylo is. A band that cares about their fans would "choose" (as you say) to play an even more intimate venue than an arena, say a amphitheater.
The bottom line is this: Coldplay is like most other artists: they're in it to make money. There's nothing wrong with that, but it makes the argument that Coldplay "cares" more a bit tough to make. Especially with those ticket prices and the floor seats, because as we know with floor seats, it's not how much you like the band that dictates how close you are to the stage, it's your wallet. Have fun paying upwards of $500 on Stubhub for front row tickets to Coldplay. I'll have fun standing in line for a few hours to get front row at Foo Fighters, or standing in line half the day to get front row for U2 next time around.....and only paying $100 or LESS for that. The Chili Peppers are doing the same thing with floor seats, and it pisses me off just as much as Coldplay because I cannot afford or justify spending $100-$200 on Stubhub just for one floor concert ticket, because I'll be damned if I spend $80 for a ticket way up in the rafters.
If Coldplay were truly about "choice", how come they don't do arena gigs everywhere? They could easily play 2-3 night arena gigs in the U.K. to accommodate their fans....and yet they "choose" not to. Explain that one to me, please.
As for U2, point me to an album that was a clear attempt at grabbing radio hits like Mylo is? NLOTH wasn't. HTDAAB wasn't, either. ATYCLB could potentially be argued as being too radio friendly, but the songs on that album sound nothing like the songs on the radio at that time--they got airplay because they were good songs. And I don't think any of the older U2 stuff would qualify, either. The point is, truly great bands are able to get hits on the radio without sacrificing the quality of the music. They don't have to put out an album full of stuff that fits right in with pop radio. Guys like the Black Keys, Foster the People, even GOYTE are proof of that. Be different and put out a great song, and it'll be well-received by the public. I just hope U2 doesn't make Coldplay's mistake by releasing a CD like Mylo next time around.