I emailed FreshBooks and asked why they do it. I got the following reply: Hey Matt, I can't really speak to why everyone does it, but Rackspace has provided

I emailed FreshBooks and asked why they do it. I got the following reply: Hey Matt, I can't really speak to why everyone does it, but Rackspace has provided us with amazing service so I think its something of a hat tip in recognition. Have a great day Matt, - John