I have noticed this a number of times. There's one more similar thing: there are several domains based on people's forgetting to change alphabet layouts when typing in top site names (google, yahoo, ...)
If you go to fatfingers.com you will find many keywords are mispelled and looked up quite often. When I was learning I was told to use one keyword mispelled in meta tags. I get at least 25 searches for that mispelled word a month on one of my sites.
Yes, some words that people use to mis-spelling can bring you good traffic. Not only mis-spelling but the short form "word" work also
This method would be good unless the user clicked "did you mean_____________" when google corrected their typo
that's not the instance all the time...your just lucky that the output becomes positive...but much better if you become aware of the misspelled words...
yes, you can target those word with some spelling mistake... because some time when I type some word, might be type wrong key... just for example like word above "wrong key" above, I mistake type in "wrong jey" because the "J" actually behind "K". accidently hit wrongly