Why do truckers use uShip?!

Hello everyone.

I'm neither a trucker nor live in the US. But i've recently had to deal with uShip. A driver offered a 3000$ bid on my shipping and i agreed. During the later events i've found out that not only i had to pay additional 100$ to uShip as "Service Charge" but also uShip took 400$ from the price offered by driver. It seems to me that such fees are really high. Perhaps, i know nothing about american trucking but i really wonder why do truckers work with uShip.

As far as i know there are other web-sites and mobile applications which match shippers with drivers. I haven't explored them thoroughly so probably they are no better but still there must be some reason why uShip is so popular. On their web-site's main page they claim to have almost 800 thousands servise providers. So what's the secret?

 

I always suppose that noone wants to work at a loss so the people making these bids probably can afford such low prices. Or do they hope to get more money using some tricks after their bid is accepted?

 

Then who are the bidders?

 

You're probably talking about Uber Freight? Have you used it? Is their approach better for truckers?
I can't download Uber Freight's mobile application in my country but on Play Market it is much less popular than uShip's one.