Source: www.gamasutra.com – Wednesday, May 30, 2012
[Every other week, Gamasutra examines the fastest-growing Facebook games according to monthly active users, looking at which titles and developers are having the most success attracting new players on the social network.] Whenever a social game in a particular genre becomes a hit, plenty of developers rush to put out similar titles — some past trends we've seen on Facebook include farming, hidden object, pet sims, city sims, etc. The latest trend appears to be …

Bubble shooters showing growth on Facebook