You don't need to be the size of Coca Cola to successfully astroturf, there are enough companies specialized in social media marketing. Take r/mechanicalkeyboa

You don't need to be the size of Coca Cola to successfully astroturf, there are enough companies specialized in social media marketing. Take r/mechanicalkeyboards for example, arguably a niche community. The enthusiasts there are very motivated to buy new things and are willing to pay quite a lot of money for them. Place a few of your bots there to promote your artisan keycaps and watch people pay top bucks for them.