I get asked for free stuff all the time, as do many others. At least if they asked for a discount I might consider NOT telling them to go forth and multiply. I only send stuff out free to regular customers or those that I deem worthy
If you claim to be a reviewer then you likely have a monetary interest (google adsense, advertising space on blog etc.) so you can bloody well pay for items to review as an investment! IF someone decides to send you something out gratis, consider it a bonus and if you want even more credit from the community. GIVE IT AWAY as a competition prize once you've reviewed it
Rant about self entitled git "reviewers" over.