Thank you. I reinstalled the extension with (master) update (I also deleted old extension data).
I set cache time to 0 s.
I reset most users ever online and deleted forum cache, so I can check when I have was some visitors on forum.
It's only testing forum with only a few visits, but Yahoo bot showed immediately in "Who is online" and in "Activity Stats" too.
In a few minutes there was record in "Who is online" - 4 users , but it doesn't show in "Activity Stats" 1 hour and a few minutes later. Maybe too soon? But I use cache with setting 0s.
I believe it will update max. users eventually, so it is not big problem for me.
combuster wrote:I am thinking of removing caching completely from this extension...
You could make default setting 0s instead of 600s.