Bands only make "real" (as in anything substantial) from touring and tour merchandise. Cancelling a tour usually means a lot of upfront money paid to book things is lost. Also, from following ProgPower's visa's issues last year, they used Insomnium as an example of thier struggles (although they were able to perform, it was a close one apparently). A LOT of money is paid just to get visas for the band to perform in the US and that money is substantial and likely all lost here.