Yes, pHarmacist, that's exactly the reason why I don't use simply the PDF format instead.
eSmartWeb has set a filesize limit to 650 KB / file if I'm right, so the only other options would be a more common archive format (like .zip) or splitting the PDF into 650 KB chunks. But I think that it would be more work to reassemble the PDF than to find someone who can decompress the .ace-files for you and give you the book
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And there is still download option #2 (streamload). On demand I will in this case also be able to send you the PDF in uncompressed state.