He's paying them 3% to 4% while bitcoin appreciates in the low 60% per year. Saylor is getting a free roll and if MSTR goes bankrupt, their shares are worth zero anyways.
Discussion
Right, but these guys are betting on his play, too. Most have covered calls so they could be making 30-40% on those while they ride it out and they're essentially getting that for free.
At least that is how I saw it explained several months back when people were questioning why people were still buying.