Even with negative house edge is difficult to make profit,because you have to know to have a strategy
moneypot has a way to have negative edge,but even that way,it is really difficult to make profit
No, its not hard, just bet flat bets and you will eventually start making profit forever depending on how big the negative house edge is, will happen sooner or later
More precisely, the bet size should be determined using Kelly formula (FYI:
http://en.wikipedia.org/wiki/Kelly_criterion), and you should be making a easy profit with very very small risk.
People have trouble understanding how the long run works.
Kelly bets are still risky considering you'll lose all your money in the long run because you'll eventually get unlucky and lose your whole bankroll if it's limited.
If the house edge is -1%, you would be just betting 1% of your bankroll each time. It is very unlikely to have a long enough loss streak to wipe out a good portion of your bankroll. For example, 10 losses in a row will just make you lose 9.56% (=1-99%^10) and 30 losses in row will make you lose 26% (=1-99%^30) of your bankroll.
Even if Nakowa had great luck to win a lot in JD, the house just steadily recouped the losses with a 1% positive EV.
I don't think any site has no house edge, and you can never make money gambling even if there wasn't an edge
A few PVP games have zero house edge, such as PD PVP and Peerbet raffles.