MassRoots was set to buy CannaRegs for a $12 million stock deal announced in August. The deal imploded after MassRoots' CEO, Isaac Dietrich, was fired. CannaRegs' CEO, Amanda Ostrowitz, said she pulled the plug on the deal to focus on what's best for her company. MassRoots' CEO was abruptly fired by the company's board on Tuesday. The deal is now off after "turmoil" at MassRoots, Ostrowitz said.