They have that power specifically people people outsource vetting of whether someone's worth dealing with. People outsource that vetting? What choice did those

They have that power specifically people people outsource vetting of whether someone's worth dealing with. People outsource that vetting? What choice did those people have? If there is a small cabal of tech giants dominating email distribution, and a user's choices are between some of those giants that are essentially as bad as each other and some smaller competitors that might be better in terms of delivering incoming mail reliably but are frozen out by the cabal in terms of delivering outgoing mail reliably instead, there is no meaningful choice or consent about having this filtering done to their incoming mail. It is a situation imposed upon them by the tech firms.