Besides spelling BEER, BEDS, ADDS, BEES, BEEP, ADDR, CEEQ (and that's just English!), numeric domains are increasingly an important content component for Chinese and other far eastern websites. They are often an important part of domain names or are used as the whole domain name. One of the reasons numbers are so popular in the east is because virtually everyone understands and uses them in their daily lives regardless of which language they speak. Numbers could also be used products, special campaigns, discount codes, "quick-dial" phone numbers etc. See this SearchEngineLand article for more thoughts and this French site for other considerations.