Reality/unscripted is super cheap to make, additionally, knowing NBCUniversal gets 10% gross revenue of all businesses/projects started by a cast member (below deck, summer house, real housewives contracts state this) while the cast members are contracted to their network/channels/peacock, it makes sense for the push. Whatever they lose from the show, if they have another Keeping with the Kardashians, all the businesses giving them 10% translates to roughly more than production/distribution and pure profit regardless of viewership.