It's been so long. I don't remember. I think he just left at first, then returned to confront slanderers here, then maybe banned? Unsure. He did show condemnation for Anandtech (as many do) but that was not immediately.
He left alienbabeltech and now does babeltech reviews? AFAIK.
Appopin flipped his wig, twice now. For some odd reason I followed that train wreck from the shadows mostly because after he left here he accused this site of having a shadowy AMD-Shill base/HQ or whatever which I defended against, though now I'd reconsider that haha - mostly because AMD basically bought the front page here at ATF which was just odd.
Anyways, Mark accused people here of being AMD shills because he gaffed on his hardware review or something, to be exact he claimed that the 6990 had power issues or something but it turned out to be his motherboard was the issue which was fixed with a BIOS update. He left here after people starting asking him to retract his incorrect statements, but as he was leaving he basically called everyone here an AMD shill and burned the bridge.
Over on ABT, he continued the AMD-hate bandwagon (which is odd because I read here he was a resident AMD fanboy) after AMD cut him off from review samples for breaking NDA (which he claims he didn't). He then burned down ABT bridge after a few server mishaps, he accused the server admin of never supporting him and left to do his own website.
Haha. I couldn't keep track after his second jump. (When work is slow, I got nothing to do but they started banning a lot of sites with "gaming" in the tags so I couldn't chase him even if I wanted to.)
I think now he's just regarded as an old miser with no real credibility but his reviews pop up here and there.
TL;DR:
Mark burned some bridges, hates AMD now, and believes ATF to be AMD-Shill HQ so buyer beware his reviews/opinions.
EDIT: Oh, reading some of the posts. I really wouldn't want to dig up the shills accusations. AMD was caught red handed here. A few posters had belonged to the AMD whatever it's called, got the whole kit didn't disclose and were going around spreading pro-AMD posts until it caught up to them. I believe they were banned. Mark isn't an NV-Shill, from what I've seen. But he got blacklisted by AMD and I think that is the motivation for his anti-AMD stance. He is definitely anti-AMD, and I personally wouldn't take his reviews/opinions seriously.
Rollo is just amusing. Seeing his postings over at ABT, he has a sense of pissing you off which is like level 100 troll. Last I saw he resorted to flinging poop at Mark from ABT haha.