Adding Recipients of an MSI Email to a Synched MKTO-SFDC Campaign - Say What?!

Hello,

As part of a webinar, we have asked sales to invite their prospects using an MSI email. Marketing want's visibility into who sales invited and include those email recipients as part of the overall campaign.

My questions:

• Is this possible?
• If possible, since the campaigns are synched, is using the "add to SFDC campaign" flow step going to work or disrupt the sync somehow?

I've attached screenshots showing how I plan to set this up. If there are alternative ways, or if people have done this before, I would be curious to know.

Thanks!