CSI and Au.Tra.Sy have partnered to offer the readers of the blog a 10% discount on new subscriptions to CSI data and their software Unfair Advantage. Simply go to their order page and make sure to enter the coupon code LIBERTY.
I use CSI as my main source of data, including for all the research published on the blog and I have no problems recommending them.
Disclaimer (in the interest of transparency): Any reader signing up to CSI using the coupon code would also generate an affiliate commission – on top of your discount. A “win-win” proposition in a way… Note that I am a (happy) paying CSI customer and have been enjoying their data services for 2 years now.
Below is a list of posts regarding CSI data, their API, etc.: