Many thanks for the quick reply,
After looking up the subject a bit further, I have stumbled upon this forum post from around 2014 (https://forum.eset.com/topic/3100-small-question-eset-livegrid-file-reputation/) where it is stated that LiveGrid is triggered *only* on file download and email receivals, so could the info there be considered outdated at this point, or did I miss something?
Edit:
Also, regarding the 3rd question, so I'm still not sure regarding the Livegrid mechanism, which of my data is sent over to ESET, if whole files are rarely sent (and the option could be disabled altogether), and rarity does not play a major role, where does the whole "reputation" part of the mechanism name come into play?
Thanks!