@maccs hi, too small for what, for printing? I am not sure I understand the issue.
We keep the PDF relatively small in size these days to save the bandwidth. It's been a problem in the past.
@Rathgar we lock our PDFs against editing for security primarily. We've seen all kinds of abuses in the past 10 years so we try to make things safer for people out there. When you download our materials from us directly, you are always safe but what if you download them from elsewhere? That still happens a lot. The least we can do is to make it harder for malicious 'additions' to find their way into downloads from other sites.
That's the idea anyway. I hope this makes sense and helps!