Difficult to know that, it is Business Secret.
Traveloka is Indonesia’s largest online travel startup with a valuation of 2 billion U.S. dollars, a very prospective company.
Traveloka is not a conventional company, The simply formula for revenue mentioned by Yudhistya Ksyatria may not apply.
Currently I guess they are still burning money to attract more users and compete with peers, probably they recorded a negative profit.
I have ordered flight ticket on Traveloka, the price was slightly cheaper than others and the experience was good.