> Website design is poor. You could definitely do with a designer to make it look nicer.

Really, in what way? In my view it's clean and simple.

> You either need to make it cheap, like $200/yr, or much more expensive. Right now you are in no mans land.

Another unsubstantiated statement. How much market research have you done on PDF libraries?

Pricing is a sensitive topic and many factors play a role in it. Too many to be assessed by an armchair expert.

> Don't worry about it not being open source; that's fine.

Where did OP express any worries about it not being open source?