I don't understand the general attendance comments? Generally, the success of the tour has to do with all dates and venues. Also, I believe a she's playing most of the same ARENAS she did during The Monster Ball and BTW Ball...
Most of the venues for artRAVE are A LOT smaller that the stadiums used for the born this way ball!!! also I personally don't think 10,000-15,000 people per show is a failure.
Rather than trying to find the worst out of every situation try being positive - I mean, come on that's an enormous audience.
Artrave is bigger than the monster ball. If you remember the moster ball started playing in theaters then areana's. While artrave is playing at areana's and even some stadiums in Greece and South Korea. Also gaga just played her largest concert ever in a single night in Quebec 90,000 people. She dint do that in the other tours. So the artrave is technically Gaga's 2nd biggest tour after BTW Ball. Plus all of the dates so far have sold all their tickets. billboard boxscore just hasn't posted the all the sales. But artrave is doing very well for Gaga's 4th tour and 4th album.