It just happened to me that I missed my connecting flight so I have to wait for 7 hours in Helsinki. Quite annoying, but you can't do anything.

Since I anyway have lounge access but not my fellow pax we asked if they accept Finnair's compensation vouchers for payment. Sadly this is not possible. I don't understand that policy. We would have paid the 49€ with vouchers and 'real' money, but no way. We spent some time in Helsinki and just now I'm the only guest in the lounge.