Lisa Vanderpump, executive producer and star of Vanderpump Rules, could be booted from the Bravo reality show she has ruled for over a decade. The reality star’s stacked paycheck and reduced relevance to VPR’s new direction may result in her exit soon, despite the show’s fate still hanging in the balance, RadarOnline.com can reveal. The spin-off was created in 2013 off the heels of The Real Housewives of Beverly Hills, centering on the drama-filled restaurant staff working at one of Lisa’s successful West Hollywood hot spots, SUR. While Lisa has always been at the center of the successful seri…