Hi @talkingoldfish 
I just updated your plugin to (v1.1.1) and followed your JSON data set up, it worked out perfectly. You saved me a big headache and time from updating them manually since not only I had attributes for sign up but also newsletters (form created on Sendinblue such as opt in). I can’t appreciate enough for your help and the time you put in to create and update the plugin!
Also just found out that Sendinblue system matches the new imports and attributes to the contacts that are already in the account so it does not import duplicates. I am loving it.
*For anyone that’s considering which email marketing service to use, sendinblue is a great option, still a newbie but have been very impressed with their customer support, replied with efficiency and detailed guidelines even with video instructions.
(Not affiliated with Sendinblue)
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