Thank you very much for your support and comments.

I believe that for the time being the event is still too small to generate interest for people from very far away. Due to the size of Brazil, coming from other countries ends up being very expensive for an event of only 8 hours.

As the intention is to have a monthly meeting, our plans are to announce it an average of 3 weeks before the event. This one was announced too late because it was sponsored by a community and we were waiting for their logo to be put on the flyer and banner, but the person who closed the sponsorship deal with us stopped replying and we ended up delaying the publicity and production of the graphic materials for this reason, but the next one we'll be organizing this far in advance.