Funding and Acquisitions: Digital ad optimizer The Rubicon Project closes an $18 million round

Today’s funding and acquisitions news roundup from across the web:

Advertising

The Rubicon Project Raises Another $18 Million, Completes Fox Audience Network Acquisition (via TechCrunch)

Software and Services

Open Source Software Firm Acquia Raises Another $8.5 Million (via Mashable)

Vindicia Raises $20 Million For On-Demand Billing Platform (via TechCrunch)