Coinbase is not a greedy exchange site. The listing must be based on the SEC's framework.
it's not always about money.
So you think there are works going behind the general public's knowledge and with the social media so active none of the news are leaking online is hard to believe. Coinbase is a business and they will do anything that gives them a profit, they are not conducting a charity to promote the crypto market, they are in this market to make money and hence you cannot trust any company blindly.