I couldn't find anything about opting-out at the my.avast.com website. But, I do know this, whenever you download
and install "any" software the producers have a record of it somewhere. avast uses some of this information to know
how many machines are protected by them and to send vps updates. avast also uses this information to find out how
each person uses their products. By doing this avast is in a better position for future development purposes.