2 years to a billion dollars. Who they?

Cracked by: raklodramA, rickde, KK, Sumanth Patlolla, badideabear, byslexia, Manish Achuth, Ananth, ht, Mayukh Bose, Bharath, Raghuvansh, Amarendra Kumar, Rogi, Logik, Shwetha Maiya, Bipin Banavalikar, Dibyo, Kaustubh Mhatre, Jayaprakash B R, Sujoy, Vishwas B Sharma, sanador, vinayaknp and debjani