Table 1. Summary statistics (observed data).

		N	Mean	Median	Min	Max
siterankdata.com
	Alexa Rank	339	282,182	258,266	346	986,677
	Estimated monthly unique users	339	4,697,358	367,782	95,241	289,444,543
Google trends
	Sum of index values	351	0.02	0.01	0.00	1.40
	Median of index values	351	0.02	0.00	0.00	1.59
Number of Workers
	Total	162	869,173	50,000	80	31,464,473
	<10k	37	3,237	2,700	80	8,000
	10k–100k	57	33,648	25,187	10,000	90,237
	100k–1mn	45	321,628	259,508	100,000	856,327
	1mn–10mn	19	1,891,763	1,480,933	1,000,000	7,000,000
	>10mn	4	22,087,877	22,443,518	12,000,000	31,464,473
Share of active workers
	Worked at least once	7	8.6%	1.3%	0.2%	36.8%
	With at least 10 completed projects or at least $1000 earned	6	2.0%	0.3%	0.1%	10.0%