Is Twitter pondering a subscription model (again)?

In the on-again, off-again, on-again conversation around whether or not Twitter would consider a subscription model, according to Recode, it could be on again. 
At its annual shareholders meeting in San Francisco, responding to a question from an investor, Twitter CEO Jack Dorsey indicated that a model that could include access to features and services is something that “has been kicked around for quite some time.” 
The platform and company have been aggressive in seek