Could you give me the site where I'll start posting for the campaign?
Hey!
They have their own bounty campaign site at
https://bounty.geopin.network, so I guess that is what you are looking for.
Signature campaigns for bitcointalk are under "BTT-Signatures". Not sure if typo or if it is a common way to mention what I use to refer to as bct.
There are bounties for adding ideas, referral program, twitter, facebook, medium etc, creating map content and "content creation" and translation as well.
Go have a look! In my opinion they deserve more attention than they seem to get.