Please consider writing your hashtags in upper camelcase so screen readers have a chance at figuring them out.

#whyistayonmastodon sounds like an giant undecipherable mess of sounds.

#WhyIStayOnMastodon reads out "Why I Stay On Mastodon" 😄

(Reason #44 I stay here: my previous requests like this have been generally well-received, proving that most people are awesome.)

@jond This! The classic example of the genre being #susanalbumparty where what was meant was #SusanAlbumParty but it got misread as #Su'sAnalBumParty ;)
*Note to non-UK readers: Susan Boyle is a minor celebrity singer following her appearance on a TV talent show. Also. bum is slang for bottom here.