The GBX team are well aware about liquidity and are working on that. Hence why they have added BCH and BSV and are also including tokens from the Grid sales as well. GBX are taking the strides and effort to add more liquidity and variety in trading.
Mate, BCH is just a piece of useless copy of BTC. But the talk about another things. Where is BCH trading? At Binance, Okex, Huobi, Upbit, Bithumb and other popular exchanges. People no need in another one ew exchange for trading by old coins. But they need exchanges for new coins like nOS for example. This coin still not trading at popular exchanges and people will be trade at new exchanges like GBX. They can understand this simple things?