Was asking myself the same thing. This would make sense if your submit button will actually cause an ajax request that you might want to repeat. But actually submitting the form will cause a page reload either way, or not?
They also apply different methodologies from case to case. Some publishers include Comscore's tracking beacon, so their data will be based on a mix of panel and "real" tracking data whereas other data will only rely on the panel.
What I would like to add is that the author seems to neglect, that it's actually the negative comments through which you are able to learn new things about a specific topic - for the exact reasons that you mention.
I think the beautiful thing is, that you can use whatever browser you want. Yandex' is just another option, that might not be right for you, but might fit the needs of several others.