So, I have a list of good backlinks (not a PBN), but a list of backlinks I use with automated tools to post on, and I'd like to seo on a lot of niches, but right now I can't afford a lot of domains and hostings, so I'd like to ask the following. If I make multiple subdomains on one main domain, and build same backlinks on those domains, will I get ranked on all of them? Do they have effects? How do subdomains work in SEO terms? Thanks in advance.