If you're judging by profits and commercial success, then of course Satyricon aren't successful, they're a black metal band (to state the fucking obvious). But within the boundaries of black metal, Satyricon is about as successful as it gets. You can't argue with either of those points. Aside from the fact that Pantera are kinda crap, it's not every day you see such a popular metal band taking a black metal band like Satyricon on a huge tour.
The comment of "good in style but mostly boring" is rather contradictory too... whilst Satyricon don't do anything really "out there", so to speak, for the most part they've had somewhat of a distinctive style. They don't sound like they're ripping anyone off, IMHO.