The British, EU, and US can get away with extorting FB/MS/Apple every few years because the loss of those markets would be greater than the extortion they're asking for (in the form of regulations).
It's laughable that the small market Burmese think they can pull this garbage. Facebook doesn't need Myanmar and the Burmese government would best prepare for a second insurrection if they think their people would be okay with Facebook pulling out from Myanmar.