He bought the services of the Acquitor Seren Pedac to facilitate trading with the Tiste Edur.

The contract for those services has four of it's ten years remaining.

He pays the Nerek tribesmen two docks a day.

MT UK mmpb, p. 70

'Buruk the Pale carried with him secret instructions, a list long enough to fill an entire scroll, from other merchants, speculators and officials, including she (Seren Pedac) suspected, the Royal Household itself. And whatever those instructions entailed, their content was killing the man. He'd always liked his wine, but not with the seductive destroyer, white nectar, mixed in.'

MT UK mmpb, p.74