Is it a good idea to buy misspelled domain names and direct them at your site?
If you have a name that is often misspelled then, yes, this is a valid strategy. However, many companies do it with misspellings of brands such as Ebay and Facebook. Is that a good idea?
The answer is categorically no. It's dishonest and frustrates users who will immediately click backwards. Google counts this as a 'bounce' and bounce rate is a key site metric.
In that case it's a very bad strategy.