Here are some thoughts regarding RUSH:
The current RUSH has been going on for almost 12 hours and has kinda reached a standstill, everybody that knows about it signed up already and not enough new people are hearing about it.
In order for the game to continue moving they need the people's (us and others) to self promote it. That means sharing on social media or telling friends about it.
It's a social experiment, they got everybody excited about it with the smaller thresholds and cool prizes, now we're supposed to want the next rush threshold to be met so we can potentially "buy" a good prize for cheap.
The question is, how do people feel (or what will it take) about promoting/spamming their newsfeeds or friend lists with an advertising campaign for "some random company".
There are some "deals" that people don't like sharing since it can lower their odds of benefiting themselves if something happens and it ends. Although in this case if it doesn't get shared; the threshold doesn't get met and nobody wins.