From the 'more games' page:
You can obtain 5 free games if you reset your account.
Attention! If you choose this option, all your items, quests and scores will be brought down to zero*. These free games will be available tomorrow.
*This is in bold
but the fact is, from what a few people have meantioned is the fact that "Obtain 5 free games!" is underlined and draws your attention faster than the warning. Perhaps at least an "are you sure?" popup to confirm it.
though i love that the Kiwi from "The New Zealand Story" appears next to its relevant pay option ;p