My guess is that Valve prepare the coming of their hardware on November 10 and they got a deal with some developers to "enhance" their old games to be fully compatible with the new hardware.
Heck they even released an update not so long ago for KOTOR 2
I too would like to have access to a trainer for the retail version of Max Payne 3 - ver.184.108.40.206
Unfortunately the .exe is 23,740, even compressed my email client would probably reject it.
I have uploaded the .exe file to Google Drive as requested and sent the link to Chris O'Rourke, I hope it has worked 🤔