For my company, having a "license" makes the difference between it being "open source trash" and a "product". Previously, it would be easier to get funding of $50k for a crappy product than to get approval to install even the most polished and widely-used open source offering. With these new arrangements, I'm much more likely to get a corporate software licence paid for.
However, what's missing is a support licence. This makes some managers nervous. My management likes to know that we have an official support contact point if we strike problems. It matters nothing that the product is supported by a group of skilled volunteers far better than most commercial products in the industry. They want some kind (any kind) of service level agreement, even if it's something like "7 day response time by email; bugs fixed on best-effort basis only".
Cheers Jeremy