Repeat the test with a small PHP script in between that does +1 every time it is called to a value in the database of a text file. Then redirect to the real web

Repeat the test with a small PHP script in between that does +1 every time it is called to a value in the database of a text file. Then redirect to the real website that you track using GA or your own tool. Until then, unfortunately, your argument is invalid. I think you will see this number will be quite close to what Facebook reports. What's left then, still isn't 100% fraud done by Facebook as you somewhat imply, but also aborted clicks etc, but a number we can actually discuss.