Doesn't look free to me.
(and I'm not being narky. This is the point I'm making; it's only superficially free. Then you have to say, ship a game, and woa~ wait, it has to be GPL now if you bundle the runtime, or you have to pay a licensing fee?)
For example, if you manufacture a device where the end user is not able to do an upgrade of the Mono virtual machine or the Moonlight runtime from the source code, you will need a commercial license of Mono and Moonlight.
Or if you ship an application that requires to statically link the Mono runtime and you are not able to provide the object code to relink Mono, you must obtain a commercial license from Xamarin."
You can bundle as much as you want, as long as you adhere to the rules.
'as long as you adhere to the rules.'
Yes, by 'obtain a commercial license from Xamarin', they mean, 'pay a license fee'.
Like say, if you ship a mobile game. The only reason Unity gets away with it is because they have a licensing deal that permits them to ship mono.
If you want to write a mobile game, you pay for it.
That's not freedom.
To most users of Unreal Engine, mobile games aren't really a priority, though I understand Unreal wants to change this.
The problem in the mobile case is not that Mono isn't free; it's that the licence isn't permissive enough.
That mobile platforms and GPL-style licenses don't play well together is nothing new, and I think it's misleading to call Mono "not free" just because the restriction of the Apple App Store and iOS don't allow you to use it there.
Then read again.
The fact is the runtime and libraries are MIT and LGPL. Your statement that your game has to be GPL if you use them is totally wrong. Least of all, because the GPL is neither of those two licenses, but most importantly, those licenses allow you to release a game under a license that's not even MIT or the LGPL, because that's the nature of those two licenses.
Unity is required to pay a custom license because they didn't want to accept the terms that are available to everyone. (I almost wrote "everyone else" there, but that would have been wrong because the terms were available even to Unity.)
Anyone can use the MIT or GPL and charge for services and it is actually encouraged by RMS.