"Speaking of selling anti-gravity devices, one could easily make tens or hundreds of times the profit,"
The success of the anti-gravity device demonstration was impressive; on the same day, they communicated with dozens of interested nations, corporations, and institutional representatives, yet they didn't directly sign any patent licensing agreements—agreements involving billions of dollars can't be hastily concluded.
The Aviation Group would have to engage in detailed communications with the various representatives later on, and they would give them sufficient time to consider. Each party was negotiated with separately, because different companies have different needs, so separate discussions were necessary to note down their specific requirements. Only after everything was agreed upon could the licensing agreements be signed.