Return of the @jack, Instagram Turns 5 & Facebook’s TRP Queen

#SubjectToChange is your weekly roundup of all the social media news & updates you need to know from the past week. Get it straight in your inbox, here.

Return of the @jack

In possibly its biggest retweet to date, Twitter announced that co-founder Jack Dorsey is officially back in the seat as its new CEO. Dorsey is reportedly not taking a salary for the job and will remain CEO of Square (expected to go public this year). Now about those 316M ‘active’ users…

You Lied to Me…

Widely considered to be in the running for Twitter CEO, Adam Bain was named COO instead

On Top of the World

Happy birthday, Instagram! The social network turns the big FIVE today. In the last month alone, Instagram surpassed 400 million monthly users and is taking on Pinterest in its quest for mobile “shop window” domination, adding landscape layouts and 30-second video ads among its new ad offerings.

We celebrated by analyzing 1M posts.

TRP Queen 

During Advertising Week, Facebook also introduced Target Rating Points Buying to help better align its mobile video ad products with traditional TV buying. Partnering with Nielsen, TRP offers an apples-to-apples metric to plan, measure and buy video ads on the social platform in concert with TV ad campaigns, which has seen slow adoption from media buyers.

Buy, Buy, Buy

The chase is on to rival Amazon’s one-click buy supremacy. Since launching Buyable Pins in June, Pinterest has more than doubled the amount offered to the tune of 60 million pins (iPhone and iPad only).

While we continue to rely on TRP models and ‘Buy Me’ CTA’s, consumers alone can drive 200% conversion or higher on social. How to embrace the power of influential customers.

Tips, tricks or something we missed? Let’s change that.