Earlier quoted context omitted.
I've wondered how many announced fundraising rounds were like this. It's in everyone's interest (VCs and entrepreneurs) if the message to the outside world is "this company is amazing so they've raised a boatload of cash". But VCs might not want to give it all up front, or unconditionally. It makes it hard to say what the valuation of a company is. If the milestones are unlikely to be hit, then it's anyone's guess.
This is a common structure. It's confusing to people who don't know finance or startups when they first see it. Even VCs don't get all of their fund money delivered into their bank account when they raise a funding round. It's inefficient and undesirable for everyone involved to have to move all of the money up-front, at once. If you talk to anyone in startup funding or finance they'll be familiar with the term "capi…
This is perhaps because the most common round to raise is a small/early one, and these tend not to have hurdles. Founders that only ever raised these rounds wouldn't necessarily know what happens in later/bigger rounds.
Also, I wonder if capital calls come with hurdles as well? That is, can an LP refuse to put in more money if the VC's recent investments have not done well? I would think not, since it typically takes many years to determine whether investments were good or not.