I would hope that VIK is thinking of stuff they could do for stockholders, but my gut tells me it won't be OBC. The reason being is that for many of us, we're not spending tons of money on-board, because VIK is all-inclusive (we have a different thread if you want to debate "all-inclusive"; though that thread might have been mod-locked and deleted, b/c it became so contentious) My guess with CCL, RCCI, and NCLH is that they're betting that you spend on the monies on alcohol, SD, gift shop, ShoreX, etc.
Maybe VIK could do a discount of $100 or $200 for a charged port excursion? IDK.... I do know that getting a bunch of Viking jackets is going to get old.