Yes, spotted that a) The text is identical (so this is probably a bot) and b) There's no sign on the web of XSystem these days.
Resellers are particularly useful for some countries, where people can only purchase from a company that runs from within their country - in those cases, without a reseller, people wouldn't be able to get Corona at all. Other than that, they are useful for purchasers who have a history of buying from the reseller (so they may discover Corona on there, while they would not have run across it otherwise - so that just extends the reach and promotion of Corona).
EDIT - in some countries, it's a restriction for all businesses in their country that they can only buy from a company in their country; for other places, certain organizations may have that as a rule just for themselves (most likely educational and Government organizations, for example).