Reopen the Moogle Pageantry Store now!!

[Vahlnir]

Literally the message given upon EVERY login since the start of the event...

Yep. And there's a link within that message which provided players with more details.

Look, you can show me examples of where they announced the no-spending-after-period thing all you want.

Telling me "you should learn to pay attention" is not solving the crappy design of the post-event exchange. It's also not making me less pissed.

And neither of these take away from the fact that these details were given. You, and some others, just chose not to look at them. They implement these advertisements with the assumption that players actually read this stuff. You and others made a mistake. That's okay. Seriously, it is. There's a lesson to be learned here, and hopefully it was learned for the next time there's an event of any sort.