MAU was rarely used back then so I wouldn't expect to find it.
Now it's recognized as basically the only useful metric for sites like this. GPlus, Instagram, Whatsapp, Tinder, Snapchat, and Twitter(well 4 years but close enough) all release MAU within that 3 year from launch timeframe.
Now it's recognized as basically the only useful metric for sites like this. GPlus, Instagram, Whatsapp, Tinder, Snapchat, and Twitter(well 4 years but close enough) all release MAU within that 3 year from launch timeframe.