Wow! This is definitely something to look into. Building a large following takes time though, need to be consistent with regular posting, but if you are already creating content and sharing on platforms like Facebook, why not build your Threads account at the same time?
It sounds quite interesting and fairly simple for people who are already doing this anyway. The main thing is just building an audience around what you naturally enjoy sharing. Sounds good! :)
Most of us were always busy for web2 posting... Probably, it's time to try to carve some time... Simple posting of what you already have (better within a certain niche) is a good start, with captions/thoughts that give the slightest chance for a discussion - no need to be the biggest joker on Threads if you don't feel this way.
Secondly, if some of us will like blogging on Threads and - one day, eventually, in a year or so - reach like 5000+ subscribers with active engagement, it's already the level when companies (like photo equipment ones in case of photographers) can become interested in you as a micro-influencer.
So.... Joining this initiative is investing in your own influence online, developing your own web asset, a Threads blog, with the support of HivePosh. Sounds cool to me.