I would want to be informed if/when somebody made a cheap razor that actually works for me. I would want to know if somebody made a better vaccum robot, or made it cheaper. I don't objectively need a new smart phone, but I would want to know about it so that I could anticipate what my users would want to get.
Arguably, the whole reason the big name companies get away with 5-blade nonsense is marketing. Meanwhile, on Reddit:
http://www.reddit.com/r/wicked_edge
(I'm speaking as someone who has switched to a double-edge razor and couldn't be happier)
As is discussed elsewhere in this thread, the whole concept of specialist sub-reddits makes it easy for enthusiasts to share information on their own. Mods with an iron fist, combined with comments and upvotes can be quite a decent makeshift version of democratic peer review among hobbyists. Of course, this has lots of issues of its own, but the point is that it subverts (the in my opinion ethically icky) aspects of marketing - the only thing you can really do against that is either genuinely make a good product, or be evil and subvert a community from the inside somehow.
For now I do electric and then finish up with a Gilette battery powered something.
In my case, I guess I'm pretty lucky - the morning shower is enough to soften the hairs and stubble, and if I shave immediately after leaving the shower it only takes only a few minutes.
But that only goes to show how ridiculously expensive and wasteful a 5-blade cassette would be in my situation.
I too care about cheap razors, vacuum robots or newer smartphones. But I find it intrusive when a program I'm watching is interrupted with a fast paced 30 seconds clip of sexy naked people telling me to go buy their new product right now.
If I want information, a subscription model to some sort of info periodical is almost always available. But this is much closer to what we consider "journalism" than "advertisement". (I realize the limit between the 2 is sometimes difficult to define).
Regardless, advertisers won't "inform" you about the best life insurance for you, they'll lie to make you stop thinking and trick you into buying their life insurance, which most likely will be subpar. Good products tend to advertise themselves.
I, ironically enough, don't have a need for life insurance as I have nobody who depends on me.