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There isn't a Country Representative for Argentina yet as we haven't found many active Steemians there yet.

Do you know of other Steemians there?

Actually the ones I know only one is participating in the game, my friend @pablo1601, through the tag #argentina I have visited the publications of @fendit and @belenguerra and in fact I am currently following it.
However I will contact other Steemians who live in Argentina.
Thanks for your answer @steemitblog.

Same! I still haven't found many other argentinians out there... will get my friends and family to join! :)