Just got an email from "DaFont" about a server hack and was asked to change me password. I never actually signed up so... I think this is a scam email. Was there a breach here?

i got the same email but already had an account here, they even included a link to that profile in the email.
hope it was nothing..

You most probably signed up but don't remember... (this, perhaps?)

And yes, there was a breach indeed http://www.digitalartsonline.co.uk/news/typography/dafont-hacked-accounts-passwords-stolen/

They were really late on the email. HaveIbeenPwned.com (website that emails you about data breaches) emailed me about this back in may 18th (the breach was the 16th, so it was really good notice). This is what was compromised:

In May 2017, font sharing site DaFont suffered a data breach resulting in the exposure of 637k records. Allegedly due to a SQL injection vulnerability exploited by multiple parties, the exposed data included usernames, email addresses and passwords stored as MD5 without a salt.