People that use Unroll.me grant it access to their Gmail account for its newsletter bundling feature. However Gmail permissions aren't fine-grained about only

People that use Unroll.me grant it access to their Gmail account for its newsletter bundling feature. However Gmail permissions aren't fine-grained about only allowing them access to certain senders so Unroll.me has access to all email. While they are in your email, they sneakingly check everything in your inbox, even senders that you have not rolled up, and share "anonymized" data. This is my hunch of what they're doing given the input / output they have, but none of us can really know exactly without seeing the code. They're also tweeting a lot today trying to convince people that they scan one's inbox in good conscious.