I note that there is a 200-character box which you can type your thoughts in, which will allegedly be listed on the donor list.

My question is - is there a minimum donation?

I noticed people donating stuff like 0.01USD and 1 YEN earlier, so I presume there's no minimum; maybe they've put one in or something later. Here's the page where you can see a list.

I strongly recommend donating 1 yen, which will cost more to process than it is worth to them.

I strongly recommend donating 1 yen, which will cost more to process than it is worth to them.

I just took five separate 1 hour samples from that page. Allowing for currency conversions I found that people were donating at a rate of $4968 per hour.

Nice work if you can get it.