Automatic submission can be very effective, but you do have to use some common sense because you will be flagged if you submit to the same directory over and over again.
The other thing that really ticks off most directory owners is submitting tons of subdomains or inner pages from the same site. Some directories permit this, but most of them require payment for deep links.
As far as the typo issue - automatic submission does cut down on typing errors that can lead to auto-rejection. Yes, misspellings in your titles and descriptions may help you, but you don't want to make a mistake typing your URL or email address.
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