i wouldn't be surprised if MR users are more likely to buy a lot more books than others - but i also suspect that part of the general public (including mac and linux users) adds up to at least 20% of your buyers on top of the MR users.
why not include a text link so those who either prefer to do things manually or else can't make things work otherwise have a page they can go to to add their PIDs?
Quote:
Originally Posted by ClintBrauer
I wouldn't be surprised if MR members are more likely to want the manual PID option than the general public. I would expect it's something that most people neither want nor need; but that is very important to the minority that do use it."
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