I checked the number of shots of my secondhand camera, FUJIFILM X-T1.
exiftool
The number in ImageCount is the number of shutters.
Using exiftool, I was able to get shutter actuations count.
The number of shots taken by the FUJIFILM X-T1 was 19,854.
Just to be sure, I checked to see if each time I released the shutter, it counted as one.
I tried it with another X-T1.
The first one
The second one
The third one
The ImageCount number seems to be correct, since it increases from 28 to 29 to 30 with each shutter release.