I wonder why recently some pairs BTC-XMR for example charge 5% fees on eXch when just few months ago it was 0.5% fee ?
Probably because of this:
Reserves
XMR 0
LTC 0.43086622
ETH 71.008769406473803087
DASH 0.19927767
BTCLN 5.89923531
BTC 88.43136183
USDC 11645.977994
USDT 16604.865833
DAI 11573.355943995700727100
The liquidity comes from users, and more people are buying than selling XMR. Maybe the fee trading in the opposite direction can be lower to encourage adding liquidity.