€2.49 plan adds customisation tools, messaging and calls remain free.
The messaging giant is borrowing a page from Instagram's playbook as it pushes to give users finer control over their social circles.
Italy-targeted campaign used unofficial app to deploy surveillance spyware.
The spoof document mimics an official government order but opens to reveal a jester and the words "April Fool"
Company allows access via Business API for 12 months to address EU antitrust concerns.