This is very old method of phishing, I keep getting spoof emails on regular basis for whole range of stuff.

This is NOT something MSI or any other company would do so easily. Normally guys they do contact are ones like Splave for example due to what they can do, not only because of the following they have but also in that they can make their product look good too and it's always done through certain channels, not by simply sending out an E-mail with an offer.
I can also tell it's fake by the E-Mail address alone - It's a detail that stands out.

You guys have seen what I can do but even I have yet to be contacted about such in any way by any of them, that just proves MSI or others woudn't just pick someone at random for such a thing even if they have a YouTube channel because there's more to it than the channel alone.
Yes, I have a YouTube channel too but it's not for that kind of thing because I seek no endorsement or sponsorship of anything, simply to share what I've done if and when I feel like it.

You can be sure that at least one people will fall into the trap :/