1) Identify coordination failures that lock us into bad equilibria, e.g. it's impossible to defect from the online ads model without losing access to a valuable social graph
2) Look for leverage that rewrites the payoffs for a coalition rather than for one individual: right-to-repair laws, open protocols, interoperable standards, fiduciary duty, reputation systems, etc.
3) Accept that heroic non-participation is not enough. You must engineer a new Schelling point[1] that makes a better alternative the obvious move for a self-interested majority
TLDR, think in terms of the algebra of incentives, not in terms of squeaky wheelism and moral exhortation