Great to see the campaign is being renewed! As previously mentioned I still think it would make sense to let people join the same campaign again if they already joined the previous one. I have worked with the same companies more than once and this is something that's normal in the influencer marketing space so not having that option makes it a lot harder for me to refer people and companies to reviewhunt. You could at least let the brand decide if they want to work with the same content creator again and they could then approve them manually and let them join the campaign that way