HYIPs always get DDos'd when they start up. Now, why on earth would the people attack HYIPs?
Obviously, the government does not want people making money or getting ahead. Not necessarily the government but operatives within the gov, working for the CIA or bankers, but mostly just working to keep the rich, rich, and the poor, poor.
When Bitcoin mining gets DDos'd, it tells me, personally, that the people who do not wish others to make money in this way, are the ones who are attacking. I doubt that it's frustrated people. I think it's collaborative among gov agencies, working privately.
Of course it's just a guess and i'm paranoid and always offer up the conspiracy-ended possibility, but you have to look at "where is the motive"? and "who benefits"?
People overlook the fact that central bankers control a whole lot of computers, people and corporations, as well as governments themselves. And then they overlook the fact that doing this would definitely be in their interest.
Just saying, I don't think it's random hackers.
Occam's Razor says it's a botnet hearder that's pissed because they got locked out of the 4 largest polls (and probably more) and is DDOS'ing the pools instead.