What kind of blackhat SEO?
Blackhat SEO type 1:
1. Hacking multiple hosting accounts that host thousands of sites.
2. Making subdomains, subfolders, changing homepages on said domains and linking to casino sites and sending them through instant indexing.
3. Ranking for 24 hours, or sometimes weeks.
4. Hacking legitimate sites and parasite them
5. Or do step 2 again, and again, and again, and do exact match anchor on your new competitors so that Google may flag them as unnatural link building - before they can build out a good backlink profile?
"Blackhat" seo type 2:
Build a backlink from a (Public)BN?
Type 2 is easy, and most likely wont net you any results. Type 1, get a chinese residency first.
If the goal is to build long term legitimate projects, promote your website via ads and content. If you can make ROI on that, you have a way better business in terms of reliability - and SEO will slowly build up with click data.