Maybe I understand the extension wrong, but I thought that I could post from every (public ) account.
After a successfull test with my private account I changed it to an another username, initiated the post fetch but in the DB were only the posts of my account (under the IG username of the another account).
No, Instagram and Facebook API is really a huge overhead. So I'm not totally sure with my answer here. But I think because you have to enable the access in your instagram account, you need admin rights here.
Maybe I understand the extension wrong, but I thought that I could post from every (public ) account. After a successfull test with my private account I changed it to an another username, initiated the post fetch but in the DB were only the posts of my account (under the IG username of the another account).