Lost from his share not comparing to Forums.Not bigger but smaller
Facebook lost 15 million US users in the past two years, report says
What? How are they getting 0.783%? Assuming they actually mean <= 1000, it should be multiple of 0.1%--either 0.700% or 0.800%, nothing in between. Even if we take the "<" literally, we end up with something pretty close--either 0.7007% or 0.8008%. Looking at the graph, market share differences within that category can differ by as little as 0.001% between days; that makes absolutely no sense. You'd need about 50k sites in that category to account for the granularity in their metrics--that's 50x more than the stated number.Most Popular Sites
Alexa Rank: < 1000
Market Share: 0.783%
Only the list of sites and their relative rankings are taken from Alexa for this data. The determination of what CMS is used by each site is made by WhatCMS. Alexa's data has shortcomings, but they're generally well understood. In particular, the rankings are good enough in a Western-centric context--they're not perfect, but if you're just sorting sites into buckets, which is what's happening here, it's sufficient.Google gets usage data directly from Chrome about what sites users use. They use it in search.
Alexa is owned by Amazon (I think) who have their own view about what users are doing. They have home units, tablets, and a toolbar.