Google did tweak up their algorithms to return relevant search results even if someone misspelled a word but since competition for such words is lower there's a high likelihood that if you target misspelled keywords your site could land on page #1 of the SERPs.
If you've been neglecting misspelled keywords, don't. It could be an easy way to get good rankings for those keywords.
If you've been neglecting misspelled keywords, don't. It could be an easy way to get good rankings for those keywords.