Sometimes I get to keep it, and sometimes I have to return it. I also NEVER sell free gear I review. I give most of the free gear to readers in raffles (see http://sectionhiker.com/category/fun-stuff/ or give it to charity. I have written hundreds of product reviews. I don't want any more gear. I fills my house and makes it unlivable.
There's an interesting history when it comes to product disclosures. I first asked all outdoor bloggers to publish them a several years ago but got the biggest pushback from writers in Europe.
Here's was my original challenge.
http://sectionhiker.com/outdoor-blogger-challenge-product-review-disclosures/
I still believe disclosures are important. It's also the LAW in the United States.
Philip Werner