When you visit that site, the first thing you see in Chrome is a giant 'missing plugin' block and an invitation to download the 'Scorch' sheet music plugin, which it turns out is available for IE, Firefox or (on Macs) Safari. JOY.
Further down, you get the following message: "We advise you to check your printer setup now before you buy. You will only get one chance to print your music after you have purchased it. If you have difficulty printing, please see our print problems help page."
WTF? OK...let's have a look at the print problems help page:
"=== It says Printing To File Not Allowed ===
"Copyright law prohibits us from allowing customers to store image files of the scores on their computers. Therefore, when you buy from us, we only allow printing to paper."
No. Seriously?
The takeaway for me: not only do these people not get filesharing, they don't get computers and their attitude to those who do is one of xenophobia.