As long as the BTC they buy is appreciating faster in the long run than dividend expenses, they could always just sell some of that BTC to pay dividends if they had to - regardless of an MSTR premium or not. The premium just provides an option to sell more MSTR instead of selling BTC outright.. That is to say, the MSTR premium is somewhat incidental vis a vis the business model.
The real trick is not going too long with BTC not appreciating faster than dividend expenses.
