[Suicide Junkie]

You're the second person I've seen mention this. But what are you talking about? There's some kind of trick? When I upgrade space yards, it simply upgrades the existing ones--it doesn't add another.

It is not available in the standard game, or any of the currently public mods (as far as I know).

However, it can be fairly easily added to a mod.
How it works is that:
1) You build a normal space yard.
2) You build a facility without spaceyard abilities.
3) You mod an upgrade for that second facility that has some spaceyard abilities.
4) You can freely upgrade that second facility into the third facility, and the spaceyard rates will add up.