...probably as a measure against the auto-renew bug...
What bug? That'd explain why it's gone
Auto-renewal occasionally increased your liquidity offers above the amount of deposited money.
+1, I think the hike in fees is quite high. But I have more problem with your discount levels (not counting your definition of "market maker") your top tier requires $20million in transactions in 30 days, that's close to $1m a day at current prices, what happens if BTC reach $1500 or more?. Maybe it's feasible in the future when there are more market participants on your exchange and have better liquidity but no way feasible in current conditions.
I hope you could at least review your discount levels a bit. Thanks
Discount levels based on dollar amount make more sense to me too, but even at the highest rate 0.15% is a pretty sweet deal compared to the competition.