I don't know how it works in Brazil, but here in EU all users/customers has the possibility to at least try F-Secure for free 30 days.
Both SAFE and TOTAL are available in the UK for 30 day trials.
Was very excited, until I checked my TOTAL subscription. Sadly wasn't upgraded, but hopefully for all SAFE users.
Sorry to cause you to be disappointed, I asked a couple of friends in the UK who use SAFE and they said they had not been offered this deal either, It seems to be random, I'd better get more devices signed up for it while the offer lasts.