Why "assume" things just for the sake of it?
I really don't get ppl especially fans hounding Salman's family for no reason. Was Salman born an orphan? Blood relation is beyond everything. If he's not gonna support his family then what's the point if he supports the whole world. Jo ghar ka nahi woh Kahi ka nahin.
Aayush dream to enter bollywood was a long one. If he married Arpita for this opportunity is not up for public debate. But he is not being launched over night. He was made an assistance since Bajrangi Bhaijaan for him to understand the ways of filmmaking. It's only post Salman - KJo fallout, Salman has chosen to solely launch Aayush or else the plan was for KJo to launch Aayush.
Lastly, Dabangg copyrights belongs to Arbaaz & Malaika (although I hope Arbaaz is intelligent enough to get full proprietary). So, milking or not, Dabangg belongs to Arbaaz as much as it belongs to Salman. Perhaps it belongs to Arbaaz more than Salman.
All of them want to bank on Salman's stardom be it YRF or a smaller production house. He's much safer around family. He has always been.