2;Why do some project owners ban some regions from participating in the Marketing campaigns of their project but Rather allows such people to invest in their project.
I'm not aware of this, if for the marketing maybe they already have someone or a certain agency dedicated for the marketing on that specific region. Since they are allowing investors from that region to invest that's the closest possibility that I can think of.
This is one possibility but I still want to know which campaign is this. Can OP drop the name here so we can also check out why the case? They are not paying that much for bounties and I find it unreasonable not add more promoters.