EMDs used to correlate strongly with ranking position in the search results. (When I say "correlate" I mean I empirically measured the data and calculated to correlation coefficients and monitored them over time. So actual math and scientific method was used.) EMDs no longer correlate strongly with ranking positions in Google. They fixed the bug.
BUT... keyword stuffing in the HTML source still correlates strongly for many keyword niches (and yes Google's behaviors change from one niche to the next)...
One method of keyword stuffing that is technically allowed is using absolute URLs everywhere you can when your domain name contains your target keywords.
So if you own "UsedCars.com" it is to your advantage to link like this:
<a href="
http://usedcars.com”><img src="
http://usedcars.com/used_cars.gif" alt="UsedCars.com Logo"/></a>
<a href="
http://usedcars.com/used_toyota_cars">Used Toyota Cars</a>
<a href="
http://usedcars.com/used_ford_cars">Used Ford Cars</a>
That way when you count how many times the words "used" and "cars" appear in the source you measure better than other pages.
Need proof?
Look at the HTML source for result pages from the google search "games"
Or better: look at "DUI lawyer los angeles"
#1:
DUI: 223 times
Lawyer: 144 times
Los: 190 times
Angeles: 176 times
Attorney: 25 times
DWI: 8 times
Drunk: 7 times
Driving: 8 times
781 LSI keyword matches for DUI (you can identify the LSI match words because google makes them bold in the search results.)
Could you imagine trying to compete for relevance with site like this and only using your target search terms 5 or 10 times on the page?
I'm not saying to keyword stuff, but measure your competition and see how they do it without upsetting Google or scaring off your visitors. There is both an art and a balance to achieveing competitive parity in content tuning.
Did I blow your mind? Good! Hopefully you will take measurements from now on!
I'll give you a clue to another secret too: Where you keyword stuff is actually more important than how much you stuff. When you figure all that out it can save you a ton of work when competing with the big boys.