wow. I just send a small amount of BTC to the mixer and was surprised about that I paid almost half of it on fees...

last time I used bitmixer, it cost only 0.0005 BTC per transaction and now 0.001 BTC...

why did the fee explode like this?
for small amounts the mixer is now pretty useless unfortunately

The btc network is bogged down so the fees needed went up, so the mixer has to use more to mix and well it probably partially protects against double spends.