Hi thiagod!
ALWL do so, because of their licensing policy, in other hand in this situation it's IMHO the best solution for current monitoring of quantity of users, & in case it will be needed to proportionally increase the number & capacity of update servers.
e.g. mentioned above free version of Avira now has by 10 million less costumers than Avast, & only have 6 update servers, so sometimes it takes ages
to get an update.
In case of Avast this situation is nonsense
.
Take care. and wellcome to the forums!
Rostik