Yes, I'd say definitely. Any SEO type of tool, whether it scrapes or posts frequently needs a mixture of proxies to work through to prevent spamming or scraping from the same address. If you're just scraping it's often just a matter of letting things rest for a while before trying again. If you're frequently posting from the same IP it's a sure way to get your IP blacklisted.
Google your servers IP address and see what comes out. ,
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I tried a few new techniques I read about here and set them up, got about 4,100 verified links in a few hours