ADD: Minion Masters - Premium Upgrade / Minion Masters + Premium Upgrade

Sadly I doubt it they will add it again, or it will happen like with Planetary Annihilation: Titans; people will create fake giveaway for the free game instead of the premium content...

You can giveaway it now.
DLC alone or bundled with base game.
It wasn't removed from steamgifts since it hadn't even existed on steam store.

Valid reasoning, but maybe it's better if they scrap it altogether, to avoid the usual spam of misleading giveaways by people who don't know / don't care about rules.

Yeah, it wasn't removed, it (as far as I know) simply never had been added [Certainly, nothing was ever created on SG for it before now]. A lot of packages don't get auto-added, I've noticed.
Don't have to bug-forum-report it, just put in an "Add Game to List" or "Other" ticket, and staff'll address it. :)

Looks like they got to it on this one already, though. ^.^

since the base game + premium have the same price, there shouldn't be any issues by adding it.