Actually effective strategies against #Meta to prevent an #EmbraceExtendExtinguish are difficult, but they start from asking "what will actually help here."
I maintain that preemptive #DefederateMeta is ineffective for this and that defederating from those who won't defederate from meta does more harm than good.
But what will help is thinking about the roadmap and getting there first. What will help is building a robust and thriving community around #ActivityPub and other fediverse protocols.