What's wrong with their margin trading fees?

They've started their margin trading with 0.05% rollover fees per day for both long and short positions. Today they informed me there are changes effective immediately. XBT/EUR rollover fee for maintaining a position is now 0.01% per 4 hours. Aside from the fact that fees are outrageously high, it is for the first time I see charging rollover fees per hour. Is rollover fees per hour a common practice among bitcoin exchanges? What's next - rollover fees per minute?