Blog Post
I think where CG is tiptoeing into legal territory is that the event is still going on AND there's a component to the event that incentives spending today so you have to spend less tomorrow (IE more "free" shards are lost each day you don't spend and miss a higher tier of the event). If we both spend and I spend 4 days from now waiting on an update I will spend more than you and that's a problem. Is it a legal problem?
In order to mitigate their legal risk one of the very first steps a company takes during a recall (which is exactly what this is - a product not performing to the expected standards) is to remove the product from the marketplace so more people are not negatively impacted. If CG allows this event to continue and then knowingly nerfs the ship I would imagine there is room to prove harm was done if you spent.