I don't agree. I guess their sound wound up getting a bit more commercial on Are You Dead Yet? but Blooddrunk is back to where they were on Hate Crew, and even thrashier. They ditched the gay neoclassical shit, and thats an improvement IMO. Alexi said they did that because "all these other Finnish bands started copying us, so we wanted to maintain our own sound."
edit: Also, the notion of arguing when a band has "sold out" is a moot point anyway, since selling out implies a band or artist going against their integrity in hopes of pleasing other people, and to know whether or not the band honestly wants to change their sound or not, we'll never know, since that would require crawling inside the artists' head.
And also, what about an artist that gets more commercial because thats what they honestly really want to do with their art, and an artist who puts the same shit out over and over just to please their fans, even though they're just going through the motions? I think I'd rather listen to the former than the latter.