From what I've been seeing mostly on my main server eu1, attacker clans aren't taking sites because they want to try making fame out of it but they are taking sites simply to flex the fact they took sites.
If your clan doesn't have a strong force, why are you taking 10-20 sites? (only to make zero fame in the end)
My clan currently follows a tactic of simply holding 3 sites (and trust me 3 sites on excellent gives a decent amount of fame), knowing that if I want to hold more, I might struggle due to the lack of defenders sometimes, you never know when you might have less or more players online, but if another clan will attack and take 10-20 sites how are they gonna be able to defend it, I mean they won't even bother trying to defend, they just go ahead and attack 10-20 more sites on next phase while other clans retake what's lost from last phase.
In the end, attacking more than you can handle will simply be a waste of your time, logical.
But I do wanna know what's happening on other servers too, am1 took attacker clans in their alliance and offered them gates, eu3 is peaceful, am2 some chaos but would like to see feedbacks too.