My intention behind the instance is to provide a place for creatives to discuss or present their work. Mastodon may be all good, but a topic tends to get lost quickly, and for authors and writers the character limit is usually an obstacle.
In contrast to the usual instances in the Fediverse, on Fapsi no one should be condemned if you link to your book on e.g. Amazon. Also, nerdy discussions about Dungeons & Dragons and other TTRPG are very welcome.