How could he have legally taken money out of the club via player sales?
Do you mean more loans?
Player registrations are considered assets, which he could convert to cash by selling.
Monies gained from the sale of player registrations are shown as income on the profit & loss account.
So.................he could then show an operating profit & subsequently declare a dividend.
However.........................Selling player registrations wil..........
a) Make the team less competitive
b) Reduce the asset & subsequent sale value of the football club.
& therefore be counter productive.
If it's correct that Lai paid, around £170 million for West Bromwich Albion Holdings, then there is no chance he will get anything like that amount back by taking out bits & bobs, especially if it jeopardises chances of promotion.