Right and wrong. Let me verify and refute some facts from assumptions.
Anyone can be "supported by gibson" but new bands will only get epiphones...not gibsons. And yes you have to use the gibson at your show (at least for one song if you bring another guitar). while most local artistes here are given guitars as a "loan", there are a rare few here that are actually sponsored and endorsed. E.g Rosli Mansor and SK from the band Peepshow, they get guitars from Valley Arts and Gibson respectively and even get to keep them without a specified loan period. I know SK personally and from what I know he just received his third guitar from Gibson. Most bands who loan Gibsons are only allowed to have one at any single time.
Ibanez is a different story though. From what I can gather, Addy is the only Ibanez endorsee in Singapore and he is also sponsored and endorsed with even a signature model. I find this quite kewl cos almost every other guy here in sg owns one. Shows that Ibanez is quite strict with who they choose to endorse and they give their support all the way, unlike Gibson who merely "supports".