Shameless suggestion: Instead of one free workbook, make unlimited free workbooks, but unusable for corporate settings. I'd recommend binary sharing: - Only I

Shameless suggestion: Instead of one free workbook, make unlimited free workbooks, but unusable for corporate settings. I'd recommend binary sharing: - Only I have access (private / personal use) - The universe has access (open-source use) But one free workbook still beats the typical 30-day trial.