Firstly I am talking about the 90 day stamp you get at the airport on arrival (with UK passport), not a visa you have to apply for in advance before you arrive.
I have been getting these 90 day tourist stamps on arrival for the last 3 years. The first year I stayed 6 months split into two 3 month periods, the second year the same, and the third year I got the initial 90 days and then extended to 180 while still in the country. The immigration official seemed to take a little extra time looking at my passport when I was leaving the country the last time, but did not ask any questions. I have never overstayed obviously.
My question is, can I continue to do this indefinitely? i.e. spending 6 months every year in brazil on these tourist stamps. I work online so can work from anywhere, not working illegally in Brazil. I am worried that next time I try to get in they may ask more questions and possibly reject me if I arrive at the airport and they either don't believe my story, or simply decide they don't want people 'abusing' tourist stamps.
Maybe I am just being paranoid, but has anyone else done this before, and just continued to do 6 months a year in Brazil on tourist stamps for years on end without any problems?