Re: Monetizing single characters
I have the word "I" in Hindi xn--i1b1g8c.com (मैं.com) but don't get that many clicks on it, about 14 in two months. I also have "from" xn--12b4a.com (से.com) which is about the same. I don't know if they are so low on hits because they are in Hindi or what, but I got them because they look nice and easy to remember too.
It might be a good idea to think about why a person is typing in the letter/character as a domain name in the first place. I have never thought to do it myself.