Considering that miners need to sell/send payouts frequently to keep up with their operating costs and distribute it to the individual miners it probably has a lot to do with convenience. Plus it appears part of the contract give the custodian first dibs on the rare sats as they are skimming them out.

BenAllenG

Right, so they do it out of convenience, and just count on the courts as their insurance. Still, no one makes a decision and thinks 

 so in their minds, it must make sense somehow.

bitcoin

47% of Bitcoin hashrate uses same custodian

Scoresby

Right, so they do it out of convenience, and just count on the courts as their insurance. Still, no one makes a decision and thinks *this is a stupid decision.* so in their minds, it must make sense somehow. 