Hello,
May I suggest a very small correction/improvement?
"Other proprietary alternatives to Adobe's PDF reader also exist, but like it, their internal working is a trade secret and these programs do not respect your right to control your own privacy and data."
should probably be
"Other proprietary alternatives to Adobe's PDF reader also exist but, like it, their internal working is a trade secret and these programs do not respect your right to control your own privacy and data."
I realise this is a very small change and I am not trying to be a nuisance (I did support the recent funding drive).
Regards, --Matthew