Its a simple trick to earn money, after you have got fame and fan base.
In India out of 2 billion, you just need 50-75 lakh dedicated fans. i.e. just 0.5% is enough.
Once you reach to that level of fan base. Your any movie, whatever you show will go financial hit for sure.
i.e you easily make 50-75 crores per movie. 100% budget recovery.
And if you act in 3-4 movies in a year. And if you manage 1 SUPERHIT movie in two years (i.e out of 8 movies). You continue to remain as favourite of that 50-75 lakhs.
In short once you reach success, with above plan, you will never fail.