Probably means they'll just stick the winners in some priority gacha or something :/

Now I really want to see a 3* or 2* win just to see how they'd even begin to handle that. And yeah, I'm not holding my breath on any "compensation" after the stamina bug thing.

Here's how I've understood it:

Flower Knight Girl developers make the game.
DMM release it to Japan.
Nutaku releases it to the rest of the world.

At the start of the event:
Flower Knight Girl developers told Nutaku that they would get 3 new brides.
Nutaku told us that we would get 3 new brides.

Today:
Flower Knight Girl developers told Nutaku today that we would not get any new brides. (reasons unknown as of this time)
Nutaku is blamed, at least initially. We'll see how things progress from here, although being honest I sincerely doubt we'll ever know why they cancelled the whole thing. We'll probably just be compensated and be on our way.