So what if people spam and use blackhat techniques to reach the top. If people are buying from these sites that means people are finding what they need. what does it matter to google? if people aren't compaining that they cant find what they are looking for then whats the problem?
There is in fact ONE case where google really never seems to care, which is with true ECOMMERCE websites.
I have NEVER seen (or heard of) an ecommerce site getting de-indexed.
I have made a few of them, and they never have many issues with the sandbox, and once they rank, they tend to stay there rock solid.
I have one particular ecommerce site that has ranked good for 2 years now, and never has any issues.
I blast the heck out of it using the classic & well know spam tools.
But anything other than an ecommerce site, you will always have to wonder if you will eventually get de-indexed.
But over all, not many sites seem to get de-indexed, other than when you use adsense on them
I myself seem to have bad luck though. I had like 13 sites de-indexed awhile back. I could never find ANY sort of pattern as to WHY (and I did a LOT of digging etc.)
My only conclusion: my luck really sucks. And no, the sites had no adsense, no google analytics, no google webmaster tools, NONE of that crap that makes it easier for google to find/review my sites.
Awell....... still have about 50 or so money sites. And more in the making.