I do not know if you noticed in power who are taking on the remaining two reference social networks: Facebook and Twitter. Thanks in part to the traditional media have massively adopted its use as a standard and normalized, and the brands in each TV commercial, every advertisement in newspapers, billboards and others refer to their social networking profiles using symbols.
And whenever a means or a brand refers to a social network, because he is interested, he is doing well and indirect advertising is helping its branding, and as each of the two social networks adopted from the beginning a different policy regarding the elements of visual identities, with effects and different evolutions.
Facebook chose early on to associate an icon with his own popular action within the social network: the Like, which was hand: Okay, not so long ago .. thereby causing increased popularity with his creation spread everywhere, and all web managers adopt the button on their websites always present everywhere.
However, Twitter does not. If you look at Twitter, Follow, or Tweet or ReTweet is not like Twitter, and Like whether it is equal to Facebook, it is even true of this network because he appropriated, and a sign that crosses borders , and has already become popular symbols, almost level with the boat Marylin or Warhol Campbell.
I do not know if you noticed either, but Twitter has continued with its policy minimalist, true to its 140 characters, and now has become more radical and puts the bird at all, even his own typeface logo is not for the very word Twitter even in your own website, only the symbol of the bird, that yes it does equal and even substitute the word Twitter, in fact, in the Follow button, tweet, etc. bird always preceded both their site on third party widgets. By concentrating all its brand power in a single symbol, short, precise and recognizable.
For its part, Facebook has for some time dropped support symbol accompanying the likes, in most applications, advocating the same strategy as Twitter, reducing image and symbol, and concentrating all his famous white f, on blue box. Facebook now uses it to show only counters of each of the actions in the stream of time-line, and to support him in the pages graphically thus is more versatile, and when you’re outside the network in their widgets, can assign any action to the famous f: Like, Recommend, Share, etc, without having to define a new symbol for each and invest in making it known to be recognizable.
And in the end, when working with these economies of scale, savings and simplicity smaller can have large benefits in the long term. And each new bid requires an investment coupled to reach the masses, it seems logical paths taken by both for simplification.