Origin access premier + standard purchase combo question

Hi guys,

@EA_Alexander does that mean that I can KEEP all the pre-order AND Deluxe Edition cosmetics/goodies if I preorder the Deluxe Edition and buy Premier for one month and then drop OAP after said month?

Even if I preorder the Deluxe Edition from a 3rd party vendor?

Thanks for your time!

Kind regards,
Seeker0815