I could build this in about the same amount of time it's going to take to describe it (love you Google Apps Script) but I'm not quite evil enough.
A good chunk of my work day is deleting endless B2B spam from aggressive salespeople who are certain that I should check out their SAAS whatever and pay $25/user/month for something I could do with a wiki page. Outlook for some reason doesn't recognize this stuff as spam even if you block it. LinkedIn is built to distribute this. It would be great to make it more expensive, painful and humiliating for these people to spray and pray.
My idea: it's Calendly only evil.
You reply saying how excited you are and provide a link to schedule an appointment. This allows them to book a slot and sends them a meeting request and a Zoom link. When they join they're just connected to some number of other salespeople who booked that slot.
Extra credit: record the meetings and auto-post to YouTube and use the ad revenue to pay for hosting costs.
As usual any of my billionaire readers who want to back this should get in touch.