The pledge pages give an option to contact them if you want to invest. Or at least they did the last time I read them carefully. They will take your millions as fast as they will take anyone else's.
Assuming they aren't a public company and will not become a public company if you have one percent of the stock they will politely listen to your opinion but you wan't really have too much influence at all. Invest enough to own 51% or more of the stock you will be the boss of them. If they go public you will have more rights to get information and vote on things but the bottem line will be essentially the same.
Check it out: http://visionaryrealms.com/company/investors/
Or:
In the United States, to be considered an accredited investor, one must have a net worth of at least $1,000,000, excluding the value of one's primary residence, or have income at least $200,000 each year for the last two years (or $300,000 combined income if married) and have the expectation to make the same amount ..