Pinterest redirects are such a pain, honestly. The platform doesn't handle 301s like Google does - when someone clicks a pin that's been redirected, Pinterest eventually updates the destination, but it's slow and inconsistent. Some pins update cleanly, others just get flagged as broken or lose all their save history in the process.
The real risk? If your competitor's pins all point to their domain and you redirect everything to yours, Pinterest can treat that sudden flood of URL changes as suspicious - especially at scale. I've seen accounts get throttled for it.
A much safer bet: keep the acquired site's Pinterest account alive and linked to its original domain for a few months, while you slowly migrate the top-performing content. Create fresh pins from your main account for the best stuff as you bring it onto your site. Don't try to do it all at once.
Also worth considering: just keep running the acquired account separately, pointing to your content. The save history and follower base might be more valuable left as is. What's your niche? The answer shifts a bit depending on how visual or search-driven it is 🌿
