Well that is how exchanges live and survive and earn money. But not all exchanges have a high success rate. Exchanges spend huge of amount promoting their website and have paid a number of people to be known and to gather more clients. Without clients exchange will bound to fail. I remember the exchange live.megacrypton, it disappeared from the web since only a few users are trading.
Aside from the huge income, the exchanges also make sure that all coins in their site is moving and so they create transaction flows which sometimes are risky and cause them to loss a significant amount of btc.
Aside from the huge income, the exchanges also make sure that all coins in their site is moving and so they create transaction flows which sometimes are risky and cause them to loss a significant amount of btc.
This is the truth, Only few exchanges are truly successful and other are actually running on loss considering the amount they invest on Advertising and paid for influencers to attract more people. and yes, while some are like that, some are making a fortune out of that.
Well, Coinbase made $1 billion in revenue in 2017. 
>>>Source : https://www.investopedia.com/news/coinbase-made-over-1b-revenue-last-year-report/
Coinbase has more brokerage accounts, over 13 million, than the trading giant Charles Schwab.
Kraken, reportedly added around 50,000 new users in a day at the end of 2017. The volume handled by these exchanges are
>>>Source : https://www.investopedia.com/news/coinbase-made-over-1b-revenue-last-year-report/
Coinbase has more brokerage accounts, over 13 million, than the trading giant Charles Schwab.
Kraken, reportedly added around 50,000 new users in a day at the end of 2017. The volume handled by these exchanges are
WOW, this is remarkable, There are it's befits by being one of the first and most secured wallets which offers trading platform too.