Why aren't people looking at this deal and saying "$240m is the price to secure their ad revenue deal?" If they paid the same amount and didn't get the equity,

Why aren't people looking at this deal and saying "$240m is the price to secure their ad revenue deal?" If they paid the same amount and didn't get the equity, would FB still we worth $15b? Paying $240m to secure their ad relationship may have been a good deal in and of itself.