but Bitcoin Cash does not qualify as a "scam". It is a competitor.
competitors are the 1500+ altcoins that are out there which also happen to have very unique names and started from scratch even though they forked the code from some other project. and they never claim to be "real bitcoin", they sometimes claim to replace bitcoin which is bullshit but that doesn't make them scam.
but when a coin which is NOT bitcoin tells everyone that it IS bitcoin, that makes it scam.
with that said, unfortunately the exchanges which earn money from fees,... sometimes don't care about these things. and BCH has a decent volume which makes enough incentive for places like Coinbase to keep it there.
This, at least other coins have the decency to have their own name and brand, the devs of all those coins have the dream of surpassing bitcoin and make their coin the number one coin, but they try to do it with honesty, bitcoin cash could have followed the same path if they just forked bitcoin and renamed their coin with any name they wanted except bitcoin, but it is obvious they not only do not want to renounce the name they want to keep it to themselves.