Respectfully, I've got to full-stop disagree with OP on this. I understand and can empathize with having put in a lot of time, energy, effort, and cash for exclusive promotional in-game material; Seriously, I know whereof I speak on this. Back in 2012, I purchased the LE Halo 4 console, as well as preordering and purchasing the LE edition of the game itself through GameStop, all for the exclusive in-game swag and the bragging rights of having it. I was all-in on the concept that by having the exclusive stuff, my online clout would bolster and I'd be appropriately heralded as a cool guy by anyone I brushed shoulders with in MP. I had FOTUS, I had PRIME, I had all the cool stuff and nobody else who didn't pour obscene amounts of dough towards Halo 4 did or ever would. To be totally clear, I'm not accusing OP of this attitude, I'm just admitting that it was a definite part of why I did that back then, and I'm definitely not proud of it.
I was completely livid when the GOTY and MCC versions of H4 granted all my "exclusive" swag that I had paid so much for to literally everyone else. As far as I was concerned, 343i had sold me and everyone else who went in for the exclusive stuff a false bill of goods by advertising it as exclusive and limited. It seriously set me off for a time despite, ironically, the fact that most of the exclusive in-game stuff I'd paid so much for truthfully struck me as pretty visually gaudy and dumb (more power to you if you like FOTUS, I think it looks really stupid and can't refrain from facepalming, hard, when I remember how much trouble I went to to get it).
Eventually, though, I kind of just came to terms with the fact that "exclusive" and "premier" preorder marketing schemes are just incredibly vapid and transparently gross. For me, it's a bit of a "fool me once," situation. I was once taken in by the promise that I'd get exclusive swag and bragging rights for my Halo experience if I just paid up ahead of time. Of course, I shouldn't have been surprised when 343i took the same "exclusive," content and then sold it again later down the road as incentives to push other iterations of the game. Infinite's marketing may or may not be different, in the end, but I'm not about to go and put a bunch of time and money into trying to get the exclusive swag.
I also find it more than a little gross that 343i is encouraging people to make extraneous grocery runs and consume copious and excessive amounts of objectively unhealthy foodstuffs during an ongoing global pandemic, all for a game that isn't even ready on time for the promotions being pushed.
In any event, I'm ultimately happy that all players who like the H4 content I paid so much for can enjoy and use it how they want. With Infinite, I think that sentiment should be, if anything, more true. Locking things like color shaders behind promotional purchases for third party marketing partners of 343i is one of the grossest implementations of cross-promotional game marketing I can ever remember, and this is a world where we get perennial renewals and expansions on Doritos and Dew COD promos. If the skins you unlock from participating are yours forever, I'll at least be glad that 343i didn't lie to you about it. But especially given the changes that appear to be coming down the pipe for Halo's customization with Infinite, I'll be completely exasperated with 343i in three years if I can't rock some orange and brown Mjolnir because I didn't buy a Kit Kat in 2020.