The Royal Forester IF Dai is serious about selling the club, why would he (or Pang) bother to put in a sell on clause? It would be of no use to him, would it? Sell players on the cheap for just enough to keep the club ticking over and stuff the club is more likely to be in his thoughts.
None.
Unless that allegation that the last-minute changes Dai wanted to the Genevra deal was a percentage of future player sales is true.
If it is and he is still going to try that with interested parties, then that would possibly explain a sell on clause.