I think the oscillation described people’s activity time. Over the course of a day, people who would register for a VPN are much more likely to do so during the evening, because during the day they are busy with work. So you observer on a daily basis a peak like this.
Such charts are very common with services used daily. For example, social media usage in a given region often has a peak during the morning, a big peak during lunch time, and in general goes up after work time.
Of course not everyone works at the same time, but a majority of people have more or less the same work times, so we observe the peaks.
I think the oscillation described people’s activity time. Over the course of a day, people who would register for a VPN are much more likely to do so during the evening, because during the day they are busy with work. So you observer on a daily basis a peak like this.
Such charts are very common with services used daily. For example, social media usage in a given region often has a peak during the morning, a big peak during lunch time, and in general goes up after work time.
Of course not everyone works at the same time, but a majority of people have more or less the same work times, so we observe the peaks.
You are right, thanks! I misread the graph and thought it was a 4 cycles per day, which was puzzling me, but is indeed just a daily oscillation