Let me be clear from the beginning, it's not wrong to partner with a blogger for a product giveaway, but if you are looking for it to convert into sales, then you are employing the wrong tactic. Furthermore, if you are simply working with *any* blogger just to get a hit for your client or brand, then you are contributing to the brand discounting mentality that has suddenly picked up speed due to the toxic mix of the economy, newer bloggers looking for freebies and the brands/PR firms who are happy to oblige just so they can say, "Look we're mentioned on X blog!"
How is that working out for you?
I'm writing this as both a blogger myself and as someone who works directly with brands for their social media strategies. To capture the attention of a blogger and gain coverage via a review or write up, takes a lot of relationship building, and for some, a little luck with just the right subject heading and catchy pitch. I'm finding that more and more brands are getting desperate to get mentioned on a blog or to simply have the ability to say, "Yeah we work with bloggers..." And due to this, they are bypassing promoting a great product and instead offer it up as a giveaway because in a sense, it benefits the blogger as well. However, this is a slippery slope and one that I think more brands need to take precaution with because in the end, it's not about how many, but about who you are working with.
Why should I actually buy your product if I can find it on *any* blog giving it away for free?
There's something to be said for exclusivity. Pick a handful of reputable bloggers and work with them if you want to engage your potential consumers with a giveaway to spark interest in your brand. But certainly do not, under any circumstances, just work with anyone willing to host your giveaway. First of all Facebook numbers don't tell the whole story. So what if a blogger touts that they have 20K fans? If all they ever do is host giveaways and promote it via Twitter, and you've all seen it -- "Help us get to 3K fans! We're giving away X product!" ...well it's completely logical to come to the conclusion that the fans and followers are only there for free stuff, certainly not for their content or even to consider purchasing from you. If they don't win your product, they move onto the next giveaway.
ARM yourself with knowledge: Ask, Research, Monitor.