I'm glad to get insights of how people perceive cold emails, thanks.

The thing with the schedule link is interesting. The tool has a schedule form that can be set as default...after the prospect clicks on the link, the schedule form will appear.

I thing it depends on the email you are getting and the timing you open the email. If you don't have a big "batch" to process, like in the middle of the day and the mail says "are you free on __ for a call or if you prefer, we can have now a 3 minutes chat" ... or something like this, I think busy people are more likely to click the chat link instead scheduling phone calls.