Yes, I have customers now telling me this also. But there's even more. If you generate a free download link and copy the URL to a browser it returns:

This is an invalid link.

Please copy the link from the email you received after purchase, paste it in the URL bar and press the enter key.

If that does not work, please forward the email containing this link to the seller.

Also, if you try to reactivate a download link, you'll see:

Transaction ID not found.
Please note, you can not re-activate free links.

Right now it appears that it would be hard to get download links to customers.

Thanks for reporting this problem, looks like some issue cropped up with our system earlier this morning. Please see this post for further details and updates as we know more: