Backlinks such as comments, profiles is an opposite of quality links. From my long testings I have found only Wordpress Article engine can give dofollow quality links - the same as guest posts. Of course DA and DR will be random. And it is a waste of resources - because very small amount of WP sites allow to post articles.
You can post the same well formatted (with headings, images) articles on several profile engines too (dofollow) - but permalink will be domain.com/profile/ramdom_name.
Google gives zero value to profile links. It can be good for anchor text diversification.
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But you should get rid of the fantasy that there is an abundance of DA90/DR90+ dofollow links out there that can be gained via automation.