I wasn't sure if anyone has done this yet but I went ahead and looked at the sales of Tomb Raider (2013) across the five platforms it's available on and did some number crunching. Sadly, I used VG Chartz as I don't know where else to look for the numbers but I found some numbers to back the percentage of the fanbase that is pissed about the Microsoft deal. Keep in mind that given my source these numbers may not be 100% accurate but they are more than likely really close.
First, the worldwide numbers sold as of Oct.12th, 2014, in millions of units:
PC - 0.27
360 - 1.72
X1 - .19
PS3 - 2.28
PS4 - .59
I don't think this includes digital sales which is probably why the PC number is so low.
Next the individual percentages of each system's sales from the total game sales of 5.05 million sold:
PC - 5.4%
360 - 33.6%
X1 - 4.2%
PS3 - 41.9%
PS4 - 14.9%
Next, the system camps put together; again, PC is probably a higher number if digital sales were included:
PC - 5.4%
Xbox - 37.8%
PlayStation - 56.8%
... Lastly, let's look at the percentage of potential fans or at least buyers excluded from buying Rise of the Tomb Raider on day one...
PC + PlayStation = 62.2%
A staggering percentage of the fanbase has been spit on by this deal. I have to wonder if Square or CD even bothered looking at the numbers.