What's the joke? Why's the number outlined?

Elon Musk posted this to Twitter. Little help please?

Help:,)

Am I missing something?

Anon is proud of himself

Anon appreciates a new culture

Anon is a good singer

When the Campaign Resumes After a Long Break

anon's new hoodie

Anon is gonna make it...

Anon gets a bonsai tree