I have seen an seo agency ranking top 3 for an "seo city" KW. The competition is quite high. I analysed their back links with open link profiler. 95% of their links are no-follow blog comments from the same same website/blog. Their anchor text is all brand name, none of their main KW. The links all have a low quality score on Open Link Profiler. Ahrefs is not showing any 301 re-directs. So how would they be ranking and are no-follow links just as good as d0 f0llow?