Apparently, the company that makes my hand lotion brand
uses coupons.com
for its coupons. The only way to print a coupon is to use a proprietary
software browser plugin called “couponprinter.exe” (which presumably
implements some form of “coupon DRM).
So, as for, I actually have a price, in dollars, that it cost me to avoid
proprietary software. Standing up for software freedom cost me $1.50
today. :) I suppose there are some people who would argue in this situation
that
they have
to use proprietary software, but of course I'm not one of them.
The interesting thing is that this program has a OS X and Windows version,
but nothing for iOS and Android/Linux. Now, if they had the latter, it'd
surely be proprietary software anyway.