Not to pump bitcoin but to sell tethers. They sell tethers to people who want to trade the tether/bitcoin currency pair on their exchange. But there is no way t

Not to pump bitcoin but to sell tethers. They sell tethers to people who want to trade the tether/bitcoin currency pair on their exchange. But there is no way to turn tethers back into fiat currency. So they are just keeping all of the money that people "invest" in tether.