My point is not to force my way on other people. My point is too get rid of the usual "I know everything, I never experienced everything but since the internet say so, it is true". I've seen too many people actign like that and geckos ending badly.
About the cooling period, German bioligists which studied egg production/cooling period/life expectancy results are that after cool females ovums were better, also, this cooling perdiod seems to be beneficial for the life expectancy, since after a very demanding period for their boy, they can fully recover. Of course it does not mean they can't breed without it. And as you said some females do it on their own (my biggest females stop feeding in winter, and enter by themselves in a cooling period).
Anyway, when people make a statement, not proven with their experience or research, but only because it's written on the internet, and without any "source". I tend to lose my cool. Everday on various French and European fora or facebook groups, we can see a lot of sick geckos only because "they know everything, it was on the internet".