I don't get how surveillance capitalism remotely qualifies as a threat in that area - putting aside the ambiguity of the term. (It encompasses red light cameras, government wiretapping and analysis tools, and shopping recommendation algorithims.) Chilling effect is the best I can think of.

Really the answer to the issues for public postings and archival is a DYI ethos and a willingness to buy storage in bulk and archive everything you consider important. The time has never been better for preservation.