Free Pro Tip (tm) from me:
If you are trying to advertise Mastodon to someone who is frustrated with Twitter, start with talking about Mastodon's strengths instead of Twitter's weaknesses.
In a similar vein, if you are introducing Mastodon to someone who doesn't really do micro-blogging but has heard of Twitter, emphasise Mastodon's strengths instead of Twitter's weaknesses.
This I find is a better way to convince people.