[28/m] My GF [27/f] is back into another pyramid scheme. Should I pawn this off as nothing?

We live together. I feel it's relevant.

The GF is now trying to become a promoter for THRIVE. A cookie cutter pyramid scheme. The last one she join she was able to break even after spending $500, but statistically, she can't keep up that luck.

Any type of resistance may come off as me belittling her judgment, but I also can't let her just throw money away.

So what's the deal, let this slide or show concern?