Have you turned a decent profit doing it?
No, not really.
I don't think any Lightning Node Operator is doing any serious money... Most of us node-runners are just happy btc-maxi/plebs trying to learn/improve/strengthen the network.
Anyway, let's look at the numbers.
My routing fees totaled 227k sats
My re-routing costs was -130k sats
My open-channel-fees was -9k sats
That sums up to 88k. But taken into consideraion the on-chain transactions from my WalletOfSatoshi/Kraken/NiceHash accounts during this time it's more like 70k sats. 70k sats is at todays USD/BTC rate roughly worth 16 USD.
These numbers are without hardware/electricity costs as well, so no, I'm not really doing any money out of this...
