Everyone loves free product. Those of us who are dedicated bloggers - that means we blog consistently, we have purpose and we strive to be professional - often get pitched free product.
Even in the early days of my blog, I was unimpressed with a PR firm or a brand offering me free product for my 'work'. You see, they were approaching me (so they said) because of my influence. They appreciated my content. They wanted to tap into my readers. The very same reasons they pay for magazine advertising and TV commercials. But, for me... because I'm 'just a blogger'...they weren't prepared to offer payment. I was offered free product.
Because, "To pay bloggers sets a bad example. People will no longer believe you or trust you if they think you're paid."