I got called once here several years back. Probably around 2005 or so. At the time, the county was still fairly small but had been growing fast so they didn't typically have a lot of trials. As a result, they called a jury pool for an entire month at a time and said most of the time there may be one trial or even none. Well not this one month... There were something like 4 or 5 that went to trial and they were talking about how they probably should change their procedure now so that they don't put too much burden on the pool. Not sure if they changed it but I would assume so. They did have an answering machine set up with a message to call and let you know if the pool needed to come in or not. It would say something like, there is nothing scheduled for this week, or report on Tues or whatever.
I was on 2 trials and barely missed being on a third panel. And I was super glad that I missed that one as it was a child molester and I can only imagine what the jury got to see and hear. Ick. The other 2 were DUIs and what I learned was that if you are sitting on a jury for DUI in WI, then it ain't their first time!
At the time, after you had served, they took you off the list for a few years - 3 to 5 but I forget the actual number. Still have yet to be called back since then. It was kind of interesting to do that one time, but no desire to repeat it now.
They did pay me mileage for travel which was funny as at the time we lived right around the corner from the county govt building, with the courthouse in it, so it was less than 1/2 mi total. So I got a check for the 3 days I had to show up for like 30 cents or something.