Google now owns Fabric, Twitter's developer platform. The news was announced on the Fabric blog and confirmed by Jeff Seibert, senior director of product.

Fabric is a modular platform designed in 2014 to help developers improve the stability, distribution, and identity of their products. Everything from the ability to embed tweets into other applications to logging into our accounts was made possible thanks to Fabric.
Following this ownership change, Fabric will merge with Google’s Firebase. Fabric team members said in a statement that their goals were the same as Google’s: to help teams build better apps, understand their users, and grow their businesses. Fabric and Firebase are two very powerful platforms in today’s market. For those who already use Fabric, the platform will continue to operate as is, but users will need to agree to new terms that will be available after the deal ends.
Twitter, for its part, plans to continue investing in public APIs and programs like Twitter Kit and TweetDeck, Ads API, MoPub, and Gnip. It is also worth noting that the 'Buy' button on e-commerce apps will be phased out as part of Twitter's upcoming exit from more commercial apps. The company will, however, allow donations to charitable causes.
