Hello Ziga,
Okay, so, just to be clear. A CTO is a used stamp, complying with the club rules?
If someone is asking not to send them, it would be nice to consider that, but in fact the same as 'no Germany before 2010', 'only Asia' and so on.
If that is the case, and you would rate neutral or less, you're using the rate system to express if you like the lot, rather than if it complies with the rules, right?