With Barnes, wasn't the World Men's Bowling championships occurring at the same time that the WSOB was taking place? I know he bowled that, along with O'Neill, Jones, and Rash in Abu Dhabi.
As far as C300 equipment not matching up for him, I believe he won the 50th Qubica/AMF World Cup using C300 equipment; IIRC, C300 swept that, as Clara Guerrero won the women's World Cup as well.
He's always been a humble guy and has put representing Team USA up before the PBA, or even traveling for the WBT tournaments (bigger payout). But the Global deal didn't really "start" until the beginning of this year, so the TeamUSA trials was the first anyone saw of him throwing it, so that does lend some viability to it being that Global was not PBA registered as to why he hasn't been on the PBA. shows.
I think before asking "Where has Chris Barnes been?", a listen to the interviews he and Lynda did with Jim Flanagan would be revealing as to what he's been doing, and why he's been doing it.
As far as Belmo goes, Jorge300 is spot on. To be honest, you could ask the same questions to PDW, WRWJ, Shafer, and others. Just because we haven't seen them on the finals, doesn't mean they still aren't competitive in the tournaments. They're there, and we haven't seen the last of them.
BL.