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I must say that don't use fully automated tools for any type of marketing. If you going to make links, do it manually don't use any software, but for form filling or some type of data entry you can use roboform for that. If you are going for marketing as i think hubspot is better tool or you can search in google and read reviews about it.

yeah i think to answer we'd definitely need to see the robots content. have you determined those pages are truly not indexed at all? like, have you googled specific sentences from those pages and returned zero results? if not, do so and make a list of all the pages that aren't being crawled by Google and compare that to your robots.txt... Or just make a new robots.txt file for each domain. Shouldn't take more than a minute or two