What is the best approach?

We are close to finishing our MVP, we already have different channels opened for how to find beta testers. One of them will be sending cold emails, but we are wondering ...
What it's the best approach or what has worked for you?

• When sending your first DM give them a link directly
• When sending your first DM wait for a response before sending them your link.

I can see both approaches, one being more direct (if they found it interesting they will click and get info, or that can be seen as spam)

What are your thoughts?
Thanks!