From what I can tell the Fediverse/Mastondon community are completely welcoming to proprietory clients. The founder of Mastondon even boosted the announcement.

From what I can tell the Fediverse/Mastondon community are completely welcoming to proprietory clients. The founder of Mastondon even boosted the announcement. Its generally best to let the community speak on these sorts of issues, they can be quite opinionated (see "Quote Toots", and "Scraping")