This seem to be a good news,I hope it does make more Ponzi developers to take a break or put an end to it, I think it has caused so much harm than good, but sometimes I honestly don't even think of the administrators of those Ponzi but people who patronises them,if every one stays off it, I think it come to an end,but no, everyone wants quick money.
This is good news only if among the arrested there are the largest fish of this scam, otherwise all captured were pawns that were led by the larger scammers.
The danger is that the main accomplices can easily create a second such pyramid, while pawns cannot.