Is Trip.com a scam?

Trip.com is a weird company. 

You will be charged instantly for the full flight price. But you will receive your ticket only 168 hours before the flight, "as this is a special fare" (Hint: No, it is not). They may also decline your ticket and refund the price you paid at the last moment (i.e., 168 hours before the departure). By then, the flight prices would have high-rocketed. Of course, these are in the fine print when you buy the tickets. But who reads them anyway? Probably a way to oversell their tickets.

I received my ticket in a few hours. But I won't use this site again to maintain peace of mind.