Ok, I have a conspiracy theory about why green is killing it now... There might be a bunch of big spenders, that came together and decided to drive purple and then they won they had all the "change team tokens" that were expensive, so they sold them all and bought into green that were cheap and now they drive green and then the cycle repeats. Somehow that there is money to be made that way or at least it pays for itself. You just need to a big initial investment to get the ball rolling.
maybe the reddit campaign is successfull
(today green, tomorrow Pink, Monday blue)