I'm not familiar with Fieldbook, but I do wonder if they weren't as savvy as Airtable when it came to sales & finance strategy.

Products alone rarely make a business. It's a perfectly viable strategy to keep forging ahead at a loss while you slowly gain market share. You obviously need to show revenue growth (sales savvy) to keep the funding coming through (finance savvy).

I'm definitely guilty of getting all caught up in product and neglecting the business side of things.