Final answer:
Lightspeed.com supports innovation through high interunit communication, allowing team members to share opinions and ideas freely across a global platform.
Step-by-step explanation:
The structural variable that fosters innovation already present at Lightspeed.com is high interunit communication. The frequent meetings held via web cams and other Internet technologies, despite the presence of centralization and bureaucracy, enables cross-functional and global teams to collaborate, share diverse opinions, and foster a culture where even unrealistic solutions are accepted without criticism. This high level of communication is crucial in multinational companies for nurturing innovation and creative problem-solving, even when facing structural limitations like resource constraints and centralized decision-making processes.