Sam, first of all, good on you for posting. Whilst I don't agree with what you suggested it has been one of the more interesting threads on the boards for a while and the fact that it has got Robbo and other mods to give some lengthy and highly interesting insights serves to prove its interest.
From the point of view of a player who played with a 'sponsored' Novice team last year I would like to offer the following viewpoint. I'm not with the same team anymore and don't think I will be causing any problems by airing my thoughts. Plus I am sure the deals are different for different teams and also different sponsors...
We were Zap and Phoenix 'sponsored' but in reflection I think the benefits of this were far in the favour of the companies than the team. We got a couple of free cases of paint for 6 tournaments of the year. We were paying around £36 per case for the cases we weren't sponsored for. We HAD to shoot Zap paint all year and were 'encouraged' to use Phoenix for all our pb related purchases.
However, more often than not any tom dick or harry can phone a paint supplier and get cases of paint at £30 or less per case, especially for tournaments etc. So over the year I personally (the teams other members will probably feel differently) feel it cost us a lot more financially to be 'sponsored' as it meant we couldn't shop around for the best deal or use different paint when it occasionally caused problems. I felt better 'sponsored' by companies like LPS that always gave me a good deal on equipment when I was in the market for it (quite often as it was my first year playing tournaments).
To summarise, in hindsight I think I would think twice about 'sponsorship' of that nature again...