Only 3 Giveaways at a time?

You get one extra slot for every 3 successful giveaways. You could also make a support ticket asking for more slots, but I imagine the response time isn't gonna be exactly fast during this period.

You get an additional giveaway slot per 3 giveaways you've delivered

You start with 3 slots. When one of your GAs ends and is marked received you get that slot back and for every 3 GAs marked received you get an additional slot. However when you delete a GA you lose that slot.

Ok, thanks.
From Christmas then 4 giveaways at the same time. :D

Thank you all for your answers.
I do not need answers anymore.
<3