I don't think makers are trying to ecash on Vashmay. If they did then we would have got a promo based on them and proper scenes in the episodes instead of rushed ones.
Heck we didn't get a single scene with Vashmay with their own baby neither we got a single scene of them with Radha.
Also focus post leap will be on triangle and the fact that Veer and Randhir will be brothers
I am not sure if and how much makers have planned for Vashmay and Radha
But if by chance they are deliberately keeping their track under wraps and they have planned a proper story for them and they also plan to give them proper screen space post leap then i will be a happy camper.