Before the shows, we saw that ticket sales were pretty dismal... but there were many "sources" suggesting she would still sell out after all. And did she? That depends who you ask.
I actually wasn't able to find any reviews of Gaga's Dubai show that included any numbers, but I can say that the number of tickets sold appear to be 20,000+/25,000 (80%), so no, she did not sell out there.
Strangely, the only numbers I could find from Dubai were reports that the crowd in Dubai will be among the projected 900,000 fans (here, and here) that will have seen the artRAVE by the time it's over. Do the Dubai reviewers not know how many people showed up, or is it that 900,000 looks much better than 20,000?
And Tel Aviv is a different story altogether.
According to one source, in Tel Aviv it was "decidedly not packed with fans". It was a "much cooler fan response than [her] previous appearance", and ticket sales were "not nearly as great as had been hoped for". The official numbers look to be a measly 45%, showing ticket sales at 20,000+/45,000.
They reported that she brought out "some 30,000 cheering monsters" to her show in Tel Aviv, even though every other source I could find reports 20,000 (though of course they ALL leave out the fact that there was room for 45,000).
Looks like her artRAVE tour numbers are just like her stage: INFLATED.