Facebook has been on a bit of a mobile spending spree lately.
The world's biggest social network has acquired the team of developers behind customer-loyalty application Tagtile; the start-up said on its website that Facebook was "acquiring substantially all of our assets." Financial details of the deal weren't released.
"It's a huge opportunity for us to take our goal -- helping businesses grow -- and do it on a much, much bigger scale than we could have on our own," Tagtile said. "We're excited by what lies ahead for....