For the longest time I've resisted posting reviews on Amazon. Why, you ask? Because they're 'the competition'. Indigo has paid my bills for several years, and I like the company.
What's changed? I had a conversation at the Chiaroscuro Reading last night. Someone pointed out how, even if people don't end up buying from Amazon, it's still a great place to go for reviews. And it's true. I've looked at reviews on their US site for things they don't sell in Canada, things not remotely book related.
And I realized that by not posting reviews on Amazon, where a lot of people are looking for reviews, I'm doing the authors of the books I review a disservice. So I've set up a profile and I'll be adding my reviews to Amazon.ca in the future.