Nice to meet you @igas! We'll represent Sydney then haha =]

I have a feeling those are all bots/stolen accounts (just a theory). I have a failed business that still has a fb page and somehow is still growing in followers. No activity on that fb page for years. I think people who trade in stolen accounts still have to keep them active by following random stuff, posting and liking from time to time. Just minimal activity to not get flagged as inactive. But not too much to get them flagged as a bot/stolen account. If you look at what some of these "folks" are posting, you might find similarities in that they all post really similar things, then could be all the accounts controlled by the same person/entity.

I was previously following a path of becoming a blogger and still follow a lot of SEOs. The state of Google for SEO seems to be: Google is for business transactions. Not for information if you're small-medium (most small-med bloggers mostly lost traffic in recent core updates). Sites that are selling something seem to be plodding along normally.

Short version:
- try get free traffic from Google by ranking on page 1 for relevant keywords. More relevant to buying is better, as an people searching for reviews or pricing are closer to buying than someone just searching for "how to".
- try show Google you're legit by having people linking to you. Don't buy shady links, this hurts your ranking

I'm also trying to launch a SaaS and here's what I'm roughly going to do (for Google SEO) when I get closer to being able to ship:
- See what competitors have on their sites in terms of articles/blogs
- Use tools like semrush/ahrefs to find keywords they're ranking for and go for them as well
- Write articles/blogs on related search queries
- Add links to your site from your socials, directories and where ever you can (partnerships with related products)
- On your site (maybe landing page if your product is gated), get 90+ on page speed metrics

SEO can be a massive rabbithole (timesink) so 80/20 it and do some when you start but don't go ham on it if you know your audience resides somewhere else. Go find them where they are.