Most of the internet’s most popular voter registration sites make no promise to not turn and sell your information to advertisers, a Vocativ analysis has found. The findings shouldn’t be reason for anyone to avoid registering to vote in the 2016 election, though it may steer you to register through the government’s own standard, unadorned portal: vote.gov. Of the nine major voter registration sites surveyed, only vote.gov, maintained by the U.S. General Services Administration, explicitly promises to neither share hopeful voters’ raw personal information with third parties nor to use it for commercial purposes. Combined, the other sites, including Turbovote, RegisterToVote.org, and HeadCount.org, have reported that they’ve registered millions of voters in this and previous elections. Some work with other companies in order to increase exposure and increase registrations. Rock The Vote, an organization that has existed for 26 years, currently has 820 active partners, said Jen Tolentino, its Director of Civic Technology and Policy, and they include massively popular web services like Twitter and Tinder. None of this is to say that each of these sites actively mine their users’ information to sell to the highest bidder. Instead, it’s that they haven’t promised not to. “The thing about privacy policies is they’re written by lawyers to sound like they’re understandable to regular people, but intentionally so that they’re not,” Nate Cardozo, a senior staff attorney at the Electronic Frontier Foundation, told Vocativ. “I don’t know under what circumstances Rock The Vote will share my personal information.”