Because smaller youtubers have almost no reach. Especially because, Dipshit Tech Tips is right: This is not something that anyone should buy. But the custom loop community are delightful sickos who don’t let that stop them. But they are very much a small percentage of any audience.
Getting it to a specialized channel like jaystwocents would increase the number of eyes on it. But folk there likely also are already ride or die with EK or whichever company they like.
And what LMG did is pretty much unheard of. The usual response to this would be, even if it was a mediocre cooler, “In our testing, the thermals were in this range which is comparable to these other products. We would probably go with the AIO or even the stock cooler but, depending on your workload and aesthetics, this could be a good buy”. Rather than “We are too stupid to follow basic instructions, maliciously threw away the card they gave us, and are now going to shit on this company for weeks on end”
And… the dirty open secret of water cooling is that even AIOs are probably overkill for most consumer builds. That is WHY outlets like j2c tend to do the complete torture tests and then talk about how no gaming workload will ever be anything like that.
I DO think outlets are going to be increasingly wary of working with LMG since one of their recurring bits is “Linus hates company X and rants about it for a month”. But the benefit of having Jake hold it up in front of a camera and maybe convince a few other people they should spend money are still probably going to be worth it.