They're been forced to as they have no other options but to work with exchanges that are willing to work with them. The very reputed exchanges like binance and their likes charge outrageous fees that most project can't afford and still stay on track in regards to minimizing their expenses.
The reputed exchanges also have their downside so probably some are willing choosing this smaller exchange over the big ones as projects that successfully complete their crowdfunding and get listed immediately get dumb heavily unlike on the smaller exchanges as all Investors are hopinyti make quick profit or minimize lost.