That's not how it used to work when it was included in the salary cap. Years ago, Parramatta wanted an Englishman to come over & play for them. As usual, the English club wanted a transfer fee. The NRL told Parramatta that it had to be included in their cap, so the deal never went ahead. A couple of years later, Souths signed Sam Burgess - same deal, only this time the NRL declared that transfer fees were no longer included in the salary cap. That's when t changed. When the transfer fee is between NRL clubs, it has never been the case that the receiver of the fee had their cap increased.
what you mean is the rule is dependent upon if roosters , Souths or broncos are involved