I support the blackouts, and I'm happy to see some of the larger subreddits starting to join, but I highly doubt this will change the API policy. The Reddit administration knew they were committing to a destructive course of action; they are not stupid, they're pursuing an aggressive, purposeful corporate monetization strategy. That said, I do hope more major subreddits speak out, and I think the 48-hour blackout will open some users' eyes to Reddit's questionable philosophy.