Meh, I am not bothered by it that much. I'm sure the guy is just busy or whatever. He is will known on the site and well trusted member.
Shitty attitude, bro. Get your frigging iTrader. It takes bloodywell 10 seconds to do it, not getting it because he is "too busy" is a crap excuse. Sometimes we just have to be reminded as well. I've forgotten before, simply because I really did forget. Something gets delivered on a late Friday afternoon, buyer gives me the iTrader and I don't see my PC again for a day or two. Come the end of that time you simply forget, and a reminder helps me to do that 10-second job quickly.
PS: If he's such a well-trusted member, getting an iTrader from him is just so much better for you.