That's very succesful for so far.

A few weeks ago, Synereo tried also to organize a Thunderclap campaign.
They had a social reach of 127,575 users
https://www.thunderclap.it/projects/46704-synereo-bl

When you look to their graph, it rose a lot on the 19th of September but also on the days before

After the 19th of September, you see the weak hands dumping and now it's back again at his normal level.