Are you allowed to join giveaways for a game that you own, but also want the DLCs for the game

I'd call it a dick move.

Usually if it's not stated in the description that people that already own the core game do not enter, it's acceptable. Especially when it's a significant amount of DLC. Now, if you owned the core Borderlands and half of the DLC, that would be frowned upon.

The problem with Borderlands is that the complete DLC pack costs as much as the GOTY version. I don't have any of the DLC, but I avoid entering GOTY giveaways. Still, I wouldn't judge if you did.

Best not to try, seeing as you own the base game, the crux of the GOTY edition.

I'd say no unless the giver specifies that it's ok. It still falls under the rule "do not enter for games you already own".

For Borderlands versus the GOTY edition? I'd say enter. Getting all the DLC is a pretty big thing.

Its an difficult question in my mind... I see it like this.

If the cost of the DLCs comes within 5-10 dollars of the price of the game of the year edition, as would be the case for a game like fallout, or borderlands, or Magica then yes, but for a game with one or two DLCs then I'd say no

Well I see it this way. let's say I own Magicka and try to go for the Magicka Pack that has Magicka + all the DlC. If I win it I could always re-giveaway the extra copy of Magicka and keep the DLC couldn't I? I mean that's what i'd do if I didn't need the Game itself and just the DLC.

People have to stop thinking in terms of dollar and cents. Sure, it's the same difference in that regard. But try to remember why this site exists. It is built on kindness and trying to build a decent community. You're voiding part of someone's gift. Who cares about if it costs the same when not only are you doing that but also keeping the game from someone else that would've used that base game RPG that lasts for like 100 billion hours. It's a dick move, plain and simple. You're not going to get banned, but you're more or less undermining why the site exists in the first place. It's selfish.

Unless the person hosting the giveaway is cool with it, don't do it.

i would say. its ok to enter a giveaway of a pack, if you own less then 50% of the cost of that pack. but that's just my opinion. it would be nice, if there was a default rule for that on the site and the gifter might specify something different in the comment or go with the default one.