I'd like to follow the responses to this conversation. Your question number 1 above sounds like the very reason we left Hubspot. If someone hard bounced from another company that was using Hubspot, then Hubspot wouldn't deliver emails to them from us either, even if they requested information from us.
I heard someone say something about re-subscribers, but I can't remember the answer. I only came on to Marketo a few months ago, so it's been a lot of new information, and I haven't retained 100% of it. I'd love to know the answer to this though.
Beth, have you posted this in the general discussion forums yet? If so, will you send me a link? I'd love to follow it.