Who else does this?
I use Kraken to trade my Euro's for Bitcoin. But because Kraken is very limited in the coins they offer, I also use Poloniex and Bittrex. Transferring BTC from Kraken to Poloniex is quite expensive (0,001 BTC, equals about €2,50), therefore I always trade my BTC to Dogecoin first, for example at 110 satoshi. Then I send it to Poloniex (fee is 2 Doge, equals about €0,005) and whenever I have the Doge on my Poloniex, I sell them for 111 satoshi. So on the trade I make around 1% profit which cancels out the trading fee of the exchanges. I use Doge for this, because it is almost guaranteed that this 1 satoshi increase will happen. It bonces all day up and down between a few sat.
Who else does this? Or does someone else has a better way?
That is very smart only when dogecoin is trading in a small range.