So I've seen a lot of ladies (especially incalls) have the Q ,Qq, qk's rates? It's common sense it's just 15 min or a short visit, but is that still somewhat of a full service in most cases? Or is it just an upsell trap of some sort?

means a quick visit, prob 15 minutes and just a bj or hj.  Kinda depends on the provider.

That's what I meant (typo)