Sadly this is standard for certain set of services and websites. I think some of these widgets similar to intercom do this. In short, I assume that the sales

Sadly this is standard for certain set of services and websites. I think some of these widgets similar to intercom do this. In short, I assume that the sales team is just following industry practices for that vertical / type of the sites. If not, then it is your job to explain the best practices for your industry (i.e., how these kinda of things will generate a lot of spam, will make potential customers weary the service, etc.).