Yes, I’m the author of both the “Nonblurry integer-ratio scaling” article and the IntegerScaler application.
Have you compared it to Lossless Scaling?
There was no reason for me to buy that app while I’m able to develop my own one. But as far as I know, the “Lossless Scaling” app uses the same Windows’ built-in magnification mechanism as I used in IntegerScaler, and that’s why both require Windows 8+. Other details of implementations might of course be different.