As I understand it, the owners were not able to send any money whatsoever at one point when the court case began (as confirmed by Suhail), and as a result couldn't send their usual wedge of cash over, which would be needed to pay the clubs (monthly? weekly?) outgoings such as, players wages/staff wages/utilities/transfer instalments etc etc.
The club needed a cash injection to cover us for the season, and so we went begging to Prem clubs to take Wharton off us, at a cut price, presumably with a reasonable upfront payment to cover the shortfall the owners would have put in.
I remember Steve Parish on talksport talking about the deal, saying something along the lines of "Blackburn needed the money" but i can't remember.