It seems that SEC is deliberately hunting some crypto exchanges with law suit that look politically motivated. How would an exchange trade only 3 pairs of crypto coins? I doubt if this kind of treatment is given to other exchanges in the US like Coinbase, Bitrex, Kraken. For sure, Coinbase has multiple coin/tokens pairs on its exchange, even others too.
However, if this news is confirmed real, it will definitely send a negative signal to other crypto exchanges willing to register their exchanges on the US area.