Yeah, it is clean. I don't know if you need to run it that many times though. I have, in the past, been really fastidious when cleaning my chain, including taking the chain off the bike and soaking it in mineral spirits... that chain was CLEAN! But then I'd put it back on and ride it a few miles and it would be dirty again. After a while, even clean chains stretch and need to be replaced.

So I try a different strategy now. I run it through those rollers a couple times every few weeks and that gets most of the gunk off. I also use a chain lube that runs through the rollers and leaches out even more gunk (oil the top part of the bottom length of the chain while you pedal so it drips out onto the ground), and that gets a little more out. Then I just wipe it clean. Whole process takes me about five minutes max. I also try to make sure that I don't leave much lube on the chain, because that is what attracts the dirt.