There are several ways to harden your instance:Marketo does use 2 factor login authentication by default.Increase to High Password security [everyone will have to re-set passwords,...
I'd be careful making it "too fun" though because of regulations like CASL and GDPR require easy unsubscribe that doesn't require logins or too many distractions.That being said, h...
You can use the API to do this with any database you choose. There isn't necessarily a connector, but tools like Boomi, Talend, Zapier, etc. can be middleware if needed.