If you are dealing with individuals that know and care enough to circumvent the tracking built into our financial system then that is also probably not a person

If you are dealing with individuals that know and care enough to circumvent the tracking built into our financial system then that is also probably not a person that advertisers are very interested in. Not only because it is an incredibly niche market, but probably because they don't see the advertisements in the first place. We are talking about people trying to figure out how to extract money from tracking and documenting the great unwashed masses. The hyper tech freaks can abandon these platforms en masse and it wouldn't amount too much more than a rounding error. Remember: The purpose of Twitter and Facebook and other social media sites, including Reddit, is to provide services to people willing to pay to disseminate propaganda. Primarily in the form of advertisements. The platform for discussions and content is not the product. The product is the people that use the platform. Anything they can do to improve the quality of the product, ie information about the users, can increase revenue. Comparing to email doesn't make sense. Also Email is such a garbage protocol nowadays that it is much more profitable to prolong its brokenness than actually solve its problems.