Case in point.
Yesterday I was searching for two pdfs on my hard drive (Ronin Arts' 13 Mecha Devices and 13 More Mecha Devices) which I had purchased earlier this year on RPGNow. After a fruitless search, I realized they were on my girlfriend's laptop, and she was in class for the rest of the day. My productivity on my project dropped to zero for lack of these PDFs.
Had I bought these PDFs through the ENWorld GS, they would have remained in my EN Bookshelf, and available for me to download whenever I needed. This would have certainly saved me from a jam.
The lesson: I will always buy from ENWorld when the product is available there, simply for this added convenience. RPGObjects does a similar thing with their products on their site, and it has saved me from lack of gaming material on numerous occasions.
Also: I do not support my LGS because they are not nice people. They also don't carry the kind of games I want to play, and don't maintain a friendly atmosphere in their establishment. If they are the heart and soul of the industry, then the industry is due for a heart attack and an exorcism.
(note: I understand there are many nice, friendly, and reputable gaming stores out there, and this opinion is in no way meant to debase or insult them. The above comments are meant in reference only to one particular gaming store local to myself, and to no other establishment. Thank you.)