Take e.g. Vault Weekend: we are promised more gnomes will drop (3x more often than during non-vault weekends, if I recall), and therefore many players spend more Time doing explore, due to the advertised drop rate.
In the case of EVK, the advertised (10% of a Vault Key) percentages are low enough that we’d need a couple of dozen vault keys before starting to wonder if something is amiss: for the plethora of players who usually get <5 vault keys during Gnome Weekend, that’s a significantly higher Time investment, based on a false premise.
Whether that Time would have been used playing other game modes, other games, or going on a camping trip is immaterial: the customer invested based on false advertisement by the company (as recently admitted by a company representative Vault Weekend data collection - for w/e 13 Sept - #176 by Kafka )
The fact that it’s Time instead of e.g. Keys/Gems (in a scenario where the false rates were about Mythic drops), should surely not shift the blame/responsibility toward the Customer who was Misled by the Company.