Great point. Frankly, no idea, since I visited in October when they weren't operating yet, so I just walked. Looking at the rules, I'm not sure about price caps. There is a different fare for single tickets, but 24- and 72-hours tickets are valid. Since the daily cap is equal to the price of 24-hours ticket, it would make sense for the cap to include night services. I can't find any source confirming it, but I can't find any exclusion either so I guess the default is that caps apply to everything?