Since you removed the limit on $1 PDFs 4 more people have pledged $1, but your total has jumped 100's.
Not saying you're wrong, or that the total wouldn't have jumped hundreds anyway, but is the issue giving away more free copies, or adding more credits? I've noticed other KS projects that include a PDF for $1 don't give anything else. A general thank you is fine. Maybe you could limit the number of $1 backers that get credited?
I will buy a hard copy when I can, but honestly, I can't even justify spending $5 at the moment.
Thanks for reopening the $1 reward, even for a limited time. Us poor schmucks really appreciate it.