My guess, DH, is that the Bulgarian Government wouldn't care as long as they believe the WTBTS was willing to compromise, which they apparently are. They don't care what they used to do or still do in other countries.
However, if the WTBTS said there were no sanctions around the blood issue and it can be demonstrated that there still are, in Bulgaria, then they would care. Is that what you meant?
Do you think the Society is stupid enough to do that? I hope so. In which case we should all start sending letters to the Bulgarian government :)