I know some out there are not trusted sellers, but I am used to online shopping. And I trust cdkeys.com store as many others do, as you can see in this link: https://www.trustpilot.com/review/www.cdkeys.com.
So if EA does not trust it, I don't see why. The thing is, it feels unfair not to have the pre-order bonuses.
But I can live with that, because I've got the main thing: the game itself.
In the list of trusted retailers, following the link you provided, strangely Steam and Ubisoft are there, but they do not sell this game and Amazon.co.uk only sells it to UK. I live in Portugal and I know there are other online stores from where I could buy it, but the price is an obstacle.
And in the same page, EA states the following:
«How do I know if I can trust a retailer?
Check out the game you want to buy at several different stores and compare the prices. If an offer seems too good to be true, then it usually is. Unauthorized retailers often offer games at much cheaper prices than you’ll see on trusted retailer sites, like the ones listed above.»
In my opinion this is wrong. It's not the price that determines if a seller is trusted on not. On the other hand, what I have seen is some trusted ones (from EA's list), as well as Origin, selling this game without applying any currency exchange rates, and others applying the exchange rate the wrong way. That's not trusted for me.