I would presume that since the announcement came straight from the State Department any potential consequences of such an announcement were considered. I also think any propaganda value the announcement may have is negligible if there is any value at all. If they're going to claim a link between the protests and a foreign power I would think they'd have to come up with something a little more substantial than the State Department asking Twitter to postpone maintenance. Could you imagine some diplomat going to the U.N. with such a thin story? I can't.

In fact, it would probably be even more effective to claim foreign involvement without any evidence at all. If they make the case using the Twitter story many people would quickly dismiss it as a weak theory. If they, instead, make bold claims and then are unable to substantiate them due to national security reasons it can't be disputed.