Jeff doesn't set the price of the stock, the market does. I don't want dividends, and I don't really care how much short term profit they make. Most of the buyers are professionals, institutions, so to answer your question, it's professional investors who are buying AMZN.
WS is a scam, and Scamazon is the poster child of all scams. No dividend. Lowered EPS over the last year. Share dilution. Assault by all the major populous states to collect sale tax. A toy no-name tablet.