In order to sign up for a membership plan, you are required to agree to an amended RPA [residential property agreement], even though the memberships are for commercial charging only. In my case, clicking on the acceptance would extend the termination date of my agreement from December 31, 2012, until April 30, 2014, and would give Ecotality the unilateral power to make further changes to the agreement. There is another thread on Ecotality's attempts to amend contracts already in effect. I was never asked to agree to the amendments, and would not have done so. This is an incredibly sneaky and underhanded attempt to accomplish the same result through different means. If you are considering signing up for a membership plan, read the agreements carefully and decide whether you really want to do this.