Many of the fees are dodgy as hell, whilst others cheap as they should be. DOGE gateway fee is a jaw dropping 100 doge, yes that's not exactly a lot USD wise BUT that's a x100 mark up of what normal DOGE fee should be 1. BTC sitting at 0.008 gate fee, is erm just no as well when 0.00000001 fee clears.

I highly suspect some of these 'gate fees' are behaving like centralised exchange fees - ie. charge 0.008 btc, send transaction to miner with 0.00004 btc fee and pocket the rest.

Still that DOGE gateway fee is the highest of any fee I've seen anywhere ever in my entire life for anything. x100 mark up which is a whopping 9,900% over charge and a 9,800% profit gain from each transaction!!!!