Bullshit...if big money is there for the taking, you can bet your ass Big Corp will be there to try and rake it in.
Example: e-cigs
Big T is in big now, and dominating the non-tank market. They are pushing for more FDA regulation, esp. over the tank based e-cigs, because they know how to deal with the FDA (and already have the infrastructure to meet FDA requirements), and it places an additional cost burden on the new e-cig makers, thus pushing out the smaller players.
The MINUTE the feds lift the banking restrictions on dealing with weed growers/sellers, you can bet every last dollar you've got that Big Tobacco will be there waiting.
I see a big backlash against them if they do
I dont have data to back it up, but an example good be the craft brew industry. People prefer small breweries and seem to move away from craft brewers when they get bought by AB. I know I stopped buying Breckenridge Brewery once AB bought them