What information goes into this list?

Time spent on league site?
Number of clicks on your league page?
General league activity?

That's a good question :)
... i guess it's about time spent logged in, do you think so?

Which list are you referring to? The one on the Toys page?

I'm not entirely sure, we didn't write that code, but I'll let you know when I find out!

Now, where is that list of most active owners? Are we talking about overall list of all players in this game?

I think we could do with such a list in order to be able to fill the leagues quicker.