Meanings of running a pyramid in English

I think he was running a pyramid scheme or something.

The company sent a letter dated Feb. 18 in which it denied accusations it is running a pyramid scheme.

Herbalife has been accused by billionaire investor William Ackman of running a pyramid scheme, an allegation the company denies.

Ackman for years has accused Herbalife of running a pyramid scheme and bet that the stock would fall to zero.

Ackman has accused Herbalife of running a pyramid scheme in which members make more money recruiting new members than selling the actual product.

Ackman has charged Herbalife with running a pyramid scheme, in which members make more money recruiting new members than selling the actual product.

Herbalife has repeatedly denied running a pyramid scheme, a model in which participants are paid solely to recruit more members into the scheme.

New Caledonia's court of appeal has rejected a request by Beijing to extradite a 64-year-old Chinese man wanted for allegedly running a pyramid scheme.

A Chinese man wanted in China for allegedly running a pyramid scheme is trying to avert extradition from New Caledonia, saying he fears being tortured.

Activist investor Bill Ackman accused Herbalife of running a pyramid scheme in 2012 and took a $1 billion short position in the company.