>>1608991
you need paid NQs. In a nutshell, every pack you buy from any of the shops gives you a certain amount of free and paid (which are indicated in brackets) NQs, and only the latter can be used in these types of banners. I'm pretty sure if you were to buy packs from their official site, it would cost you a bit less and net you a little more paid NQs compared to the in-game shop.
https://disgaea-app.xsollasitebuilder.com/ja-jp/
and you should be able to use paypal just fine, that's what I do, both on this site and in-game.
and yes, this banner is fucking amazing, I finally got my two sweethearts I've been looking for since I started. God bless anni banners