Can I automate DM (Direct Messaging) with Suparise?

No, sorry.

Although, we’re planning to add a Welcome DM automation feature soon that can be automatically sent to new followers.

We’ll never offer a DM automation other than for Welcoming messages. We believe automatic DMs replying to user DMs are harmful for your business as they are way too personal to be automated. If people speak with you, they don't want to speak to a bot.