There are also a lot of more specialized communities where you can promote an idea for free amongst the appropriate target market by simply joining a particular corner of the blogosphere, joining certain forums, etc. So this idea may still be applicable.
Then again, if you are producing a website targeting automobile tire wholesalers, no amount of free online promotion is likely to have the desired effect.
Then again, if you are producing a website targeting automobile tire wholesalers, no amount of free online promotion is likely to have the desired effect.