Haven't used it lately, did volume or number of tx increase during the last year. I ran the maker for quote a while, but didn't have much throughput, though I also used a midsize and longterm fidelity...
I recently found out that I was using it wrong. Orders in the orderbook are slow and often don't get taken. But just sending from jar to jar using collaborative txs with 8-10 participants is extraordinarily cheap and oh so effective.