Thank you. Just to be clear I didn't mean to single out people from South America, I just wrote that because based of your research it seemed like that is mostly the case. And yes, people all over can and should participate in these contests.
Everyone has a different but valid reasons for participating, some are trying to build their HIVE stake like you and I and some are trying to make their monthly bill payments. I don't have judgement, but it would be nice and healthy for the HIVE ecosystem if it wasn't just a pure extraction if they would leave at least some part of author rewards and build their stake, even 25% left from every post would have been better than pure extraction.
The contests are a good promotional idea, but they could be tweaked a bit to be more efficient. I think I will write a Splinterlands post on it with some constructive ideas :)
And I think your comment is very thoughtful @topcomment