Initially I heard about mastodon as a Reddit alternative, it was not. I have never been a Twitter user. I did create a Twitter account at some point, I only ever used it to post images from when I was at occupy Wall Street, and then later to follow a couple accounts for updates (Sean Murray of Hello Games). When I opened my own business I created a Twitter account for that specifically and used it to send out coupon codes and stuff like that.
Once musk bought Twitter I deleted both of my accounts. I had totally forgotten about mastodon, so I got on the list for a Bluesky code. Around the time I got my Bluesky code I heard about Lemmy, and then heard about mastodon again. Had my Bluesky code not arrived when it did, I would have created a mastodon account for my business instead of Bluesky. Since I never use either it is a moot point for me.