Originally posted by reh321 How do those challenges in your signature work?
Each has many more members than it has postings per month;
does each member participate in just some months?
Yes, there is no obligation to participate even if you're a member of the group, but only members can post in the Challenge threads. The Singles challenge has been around for longer and has a bigger "core" group participating (almost) every month. The Daily challenge was started up this year and was founded to give the members a place to post every day but without the restrictions of the Singles game.
The idea is just to have fun while hopefully learning something and pushing your boundaries. I find that I learn quite a lot from commenting on the other entries; formulating something meaningful about an image forces me to study all the elements of it and to think through what works and what not.
You can find the "rules" of the games in the discussion threads (which are separate from the posting threads):
https://www.pentaxforums.com/forums/26-mini-challenges-games-photo-stories/32...st-2016-a.html https://www.pentaxforums.com/forums/26-mini-challenges-games-photo-stories/32...st-2016-a.html
You'll see that the Singles group is a more established community with more smalltalk. The Dailies is, so far, a looser grouping. There are also a few that participate in both at once, or jump back and forth between the challenges.
Some members also add additional elements to the challenge, like setting a theme for the month, or (as I do this month) only use in-camera editing of the images, or cycle through all you lenses in a single month etc.
The Daily challenge is the low-threshold one, while the Singles is super for really learning the ins and outs of a particular lens.
A side-effect I have noted is that I have gotten a couple of "Explores" on Flickr each month I have participated - and none in the months I have not. Not important, but it adds to the fun, I think.