JonBrew
Landlord.
Some brewery competitions work that way, like this one and the Thornbridge/Waitrose one, but most aren't hosted by a brewer so a different "prize" is at the end of it.
I can understand why homebrewers would boycott this and similar competitions, I don't think I'd enter the Thornbridge one, because it's taking your creative work and making a lot of money on it which they keep for themselves. The difference is Brewdog are offering the winner a job which make it a bit more ethical.
The way I feel with Thornbridge though is they take your recipe, give you ã250 and a tour around the brewery. It sounds like a terrible deal considering they are gonna make a lot of money on it and not do a great deal of operational work. It's a bit like entering a song into a battle of the bands competition or something, the winner gets their song recorded and released by Queens of the Stone Age. You get ã250 for the effort, you get to see the band record the song in the studio, and you get to see it go on sale in iTunes, record stores, Spotify etc. QOTSA get the rights to the song so you make no money other than ã250 whilst the band line their pockets with your creative output.
It's not very fair.
Fairness under the circumstances of these competitions is pretty subjective. The people who enter them know what they're signing up for and that they won't get a cut if they win.
I entered both; I would have been thrilled to win and would be honoured to have MY beer brewed by either BrewDog or Thornbridge. That for me would be enough of a reward, nevermind a royalty for each beer sold.
With respect, I also certainly don't think either of these breweries (arguably two of the UK's most ground breaking) need to turn to the homebrewing community for recipe inspiration. Whilst I accept they may stand to make a decent profit from selling the winning beers, when you consider they own the plant, pay the brewery staff and purchase all the raw materials to make the beer, what price can you really put on the creative?
I also believe these competitions are great for the advancement of the homebrewing hobby in general and that can only be a good thing... surely?