Question about signal sale

 
If the same trading account is set as a signal, can it be sold on different signal platforms?
Case: real account A is registered as a signal on platform B, while account A is also registered as a signal on platform B and sold at the same time. Does this violate the mql5 signal sale rules?
Is the signal registrar allowed to do so?
 
Peng Fei Liu:
If the same trading account is set as a signal, can it be sold on different signal platforms?
Case: real account A is registered as a signal on platform B, while account A is also registered as a signal on platform B and sold at the same time. Does this violate the mql5 signal sale rules?
Is the signal registrar allowed to do so?
On MQL you can just set one account as one signal, why mql will stop if you are selling in any way to other platform apart from mql