Same reason I quit years ago. Use my money for your main purpose not for hitting me up for more donations. Seemed like more donations was their main goal though.
I am a life Member and I too hate the calls. Guess what, I disconnected my land line to the house...No more calls cause I sure as hell aint giving them my cell number. I still get their mail solicitations.
I cringe when I see their New HQ and think about all the arm twisting and campaign support that could have been used for.