Lance Burton's contract ends Summer 2012, that's when Blue Man Group's contract with The Venetian ends as well. Even though Blue Man and Venetian are both great companies together, Blue Man just doesn't fit the Venetian theme and style. Monte Carlo will be totally gutting their main theater space, and building an all new remodeled theater just for Blue Man Group.
Everyone in Vegas moves around a lot, it's all about contracts.
As for being a Blue Man Group Insider, it's not anything you volunteer for, it's a full time job, and both me and the wife are physical employees of Blue Man Productions, NYC. I landed the job as Insider after owning and running their official online fan base at bluemanfans.com for over 10 years. All promotions, fan giveaways, contests, fan meets, event planning, company leaks, insider info was released on my site first in partnership with BMG. When I moved to Orlando, I took portions of the site down to save on money due to moving costs. Blue Man Group founder Chris Wink called me and offered me and my wife the job of Insiders. We're the only two, and we're pretty much their go to audience relations marketing group for certain programs they've launched on tour in the US theatrical venues. Hope that helps explain it a little better. Sorry for giving out a link, I know it's against board rules, but I felt it was valid to explain a little insight.