Thanks for the reply, this is how I hoped it would work and I appreciate you taking the time to confirm.
As @Nosher said, I definitely see the issues you described but I also feel the onus on the freelancer (and the client to a degree). I would never do that to my client but I can see it happening. Ensuring clients don’t get “stuck” with a broken site or a site they can’t access is very very important to me hence my post about client transfer options if our accounts become inactive: http://forum.webflow.com/t/client-transfer-option-if-account-goes-inactive/27411
If a freelancer does delete their site, does the form display an error message to the website user informing them that there was an error sending the form?