Congratulations on your success! I am also having quite a bit of success from it. As for your question, you don't really want to put another AdSense account on that domain, and you probably want to remove the curated content from that site. That's because if they manually review that site at any point in the future, they'll see the ads running on the bad content and ban any account that was receiving traffic from it before, as well as the current account. Hopefully you've been using a redirect domain on Pinterest.
I always use a redirect domain when spamming social media. So you spam links to myredirectdomain.com, and then it redirects to whatever site you need it to (and you can change the site it redirects to whenever you need without having to change links, which is usually not possible on social networks). That way, if somebody goes searching for your domain being spammed somewhere, they will never find it because you aren't spamming your money site, you're spamming myredirectdomain.com . I usually do this redirect with on-page javascript - that way most bots will stop right there and not follow to the domain as they would with an HTTP redirect. So if you are already posting links to a redirect domain on Pinterest, simply pull the content from the money site and forward all traffic hitting the redirect domain to a new one. If Google reviews the money site, they'll see an empty site that used to run AdSense - no reason to ban anyone.
If you have not been posting links to a redirect domain, start! But the way I would do it with existing hard coded links is to direct all traffic with pinterest as the referrer to the same content they were trying to access but on a new domain that has a new AdSense account. I'd send anything that doesn't have Pinterest as the referrer to a 404 page. That way, when the manual review comes, all they see is a 404 page (unless they clicked over from Pinterest, which hopefully they won't). They'll just think "oh, they removed the content, and this domain isn't sending traffic to AdSense anymore anyway". This should secure your earnings prior to the review, and a new domain is cheap. However, you'll need to see what referrer the pinterest mobile app sends when it accesses your content. I haven't looked into this, but you'll need to redirect people using that referrer as well, and it is unlikely to be "pinterest.com". It will probably have the word pinterest in it, so you could just use code to redirect people with any referrer that has "pinterest" in it.