a hundred postcards at a time!?

Recently I've had the opportunity to see a few stories about very active Postcrossers.

One of them can request more than a hundred postcards at a time, and he says that if he requests just a couple of postcards, it will be skewed towards countries with a lot of participants. That's why he makes a request once a year for a hundred postcards at a time, and tries to reduce the bias of the countries of destination.

The other person has sent and received more than 10,000 cards and has decided to leave Postcrossing, although I don't know the details.

If I had kept my old account and kept sending, I would have become a Postcrosser like them, as I was a relatively early participant and had a high ranking in Japan. Even though I know that each participant is a different person, but I can imagine that I might get bored with too much bias, and I don't want to make it an annual event to request a hundred of postcards at a time. I'm enjoying the pace I'm at now, sending and receiving in fits and starts.