Doesn’t sound like you’re posting to an opt-in list, Rezwhan, and that sets you up for spam filters making your message invisible.

Building links to FF by commenting on appropriate blog posts is one of several methods to raise search engine visibility so the search engines act as billboards, sending us traffic. This has the added advantage of the visitors thinking they found it, as opposed to you chasing them like an old-fashioned (and unwelcome) used car salesperson.

Other free to nearly free, highly effective methods include article marketing and press releases.