"Some information on our supporter lists, such as names, email addresses, and addresses, may be exchanged with named partners and other organizations with principles and/or missions that overlap with those of VotePlz." — "We'll make sure people spam you with political bullshit to the end of time if you're dumb enough to give us your personal info."

Of course, on the signup form, they say "We'll never sell your data or spam you" and then point you to the privacy policy which says that.