According to Clement (the HF CEO) they are close to covering their costs, and have 10years runway: https://twitter.com/ClementDelangue/status/16947653579682861...
Why would a CEO give up equity if they don't need the capital? Wouldn't they prefer not to sell big chunks of flesh?
If he's not deploying it now, maybe the CEO is predicting rough times ahead and wants to de-risk for future cash flow or fundraising turbulence? Isn't that, too, a kind of negative signal? Or is this all prudent?
It's possible to structure a deal where the company has to reach a series of milestones to unlock each additional tranche of funding, but this is less common.