I know why. I think we all do.
Why ? I'm telling you
srcxxx uses NOMP backend, this backend uses "sendtomany" command to reward the miners. This command is not fully operationnel, there are errors. https://github.com/zone117x/node-open-mining-portal/blob/master/libs/paymentProcessor.js#L384
In payout process, if the error code is -6 (ie "Not enough funds to cover the tx fees"), tx fees are increased until command is accepted by the wallet.
I'm using the same backend, but I had to modify the payout process, to be compatible with the Digibyte wallet and not decrease the proportional rewards.
I think than srcxxx don't apply tx fees (I hope, but I'm not 100% sure).
Interesting, looks solid. In the end im on your pool now. It is very nice. Where your EU Server location? OVH in France? Nice performance!