Provide incentives for market making, 1.5-2.5% spreads are not for trading!
I login once per year to see whether spreads between bid and ask have moved and some liquidity has entered the platform. Unfortunately no progress is visible. I'm always surprised that with that low usage you can still survive, even earn something. For me this is the main risk factor for not using the platform. I propose to think hard about how to get liquidity into the platform. Some support for market making could help. Start with different liquidity makers/takers fees. Invite market makers and let them profit from the liquidity they create.