(Most) Advertising is not Effective
This isn't specific to LoL, but about advertising in general. For me personally, advertising is not really effective in almost any form. There are very few advertisements that actually make me interested in a product at all. I suppose it's partially because the 'benefits' products always say are usually just bullshit or benefits of any type of similar product has, not just theirs. Most of it just exaggerating or even misleading you about their own product so you pay 10-20% more for the exact same product.
The products I actually enjoy are random ones I just found myself that actually work well, and these are often not the products that are advertised. Maybe I'm just unique in that I actually heavily research products/studies before buying much and I almost entirely ignore advertisements. Product reviews are better advertisement than the ones they spend millions on. (except for some of the shady fake or sponsored reviews that act like it's the best product in the world worth $1000s)
The last bit about advertising I'd like to mention that really annoys me. The websites/apps that try to force advertising on you. These are the ones I completely ignore just to oppose the forced advertisements, but honestly how effective are these really? Like the ones on Pandora/Youtube/Article websites where they force you to watch an ad before continuing, I just wait until I can skip and completely ignore the ad. I'm fine with them doing this, I just think it's a very poor way of advertising, and I imagine most people do what I do and just skip it. It's almost subconscious now just to skip an ad and ignore it entirely.
I think it's a bit of confirmation bias that these companies think advertising is actually effective. The products that advertise heavily are usually already in the top 5 products of their type, so of course they're going to be bought more, but I really don't think it's tied that heavily into advertising.
What do you think of advertising, do you think it's effective? How many products have you bought/tried just because of advertising?