So what are they? Can I ask someone for QTC and they will give me 10 free contacts, even though I never worked the stations? Maybe I'm missing something here.
Well first you have to make the QSO.
But then you can ask for QTC. If they have any (even less than 10), log the traffic and you get credit.
If they don't have any, just move on.
QTC'ing is not completely trivial and requires at least some effort to do the asking and recording the traffic.
You probably are not going to ask the weak station for QTC. It's not just quantity, you have to accurately log the traffic.
It is possible in WAE RTTY to have more QTC's than QSO's if you are good at traffic handling, look at past WAE results to get the idea. It is never (even for the best traffic handlers) a 10:1 ratio, more typically 1:1 for a typical station, and less than 1:1 if you aren't good at traffic handling.
Tim.