How is trollfi explaining this one?
Please, there is another user with that name (my very personal troller): do not confuse us two.
Has the MMM ponzi also reached finex & stamp

Who knows? The MMM ponzi is global and has many imitators. Their victims can buy their bitcoins anywhere.
The surge may be just held-up money finally reaching the exchanges after a bank holiday.
Or perhaps Sergei has un-paused the scam.
Do you have a better explanation? I don't see any news or rumor that could explain it.
Taiwan declared it illegal after the kidnapping case; perhaps people there or in other countries are stocking it before access to exchanges is blocked?