SpaceX has the lowest costs of any launch provider, and within about 2 years they will have the greatest capabilities in launch vehicles with the addition of the Falcon Heavy. That combination has already allowed them to gain an impressive amount of launch contracts, fulfilling those contracts successfully ought to cement them as the most favored launch provider in the world. And the combination of low internal costs and high volume will likely translate into a profit windfall of the sort that we are more accustomed to seeing from dot coms. Based on every indication they will use that windfall to finance R&D on even more audacious plans such as super heavy lift rockets and the colonization of Mars.