Andrew would know better than me, but I doubt companies sponsor web people to switch to their cameras--too many legal/liability issues. They might give someone first access to a camera, or pick up the phone when they call, but that's about it. Why Panasonic, or anyone else, wouldn't sponsor Dave
o. He'd have to sign a contract saying he would never disparage Panasonic in the future
o. He'd have to deliver some sort of metric to keep getting payments
o. He would have to show them copy first (so he doesn't give way secrets/confuse the marketing focus, etc).
What makes Dave and Andrew so successful is you know they'd rather live on the street than follow any corporate party-line.
Lately, DPreview is getting into hot water because they came out with an article saying why the d810 was so great, even though they were just tiny improvements. The article suggested that these tiny improvements constituted a reason to upgrade. Even Nikon lovers found that a bit irritating (the improvements might make me pick an 810 over a 5D3, but for me, at least, it woudln't get me to sell my 800). On the video side, they said it had a new profile, which Andrew pointed out was wrong. In any case, the idea that anyone would sell their 800 for an 810 to get a new picture profile is hilarious, to me.