A two-or-more order-of-magnitude reduction in a problem seems like a good start and a worthwhile step, not something to disregard because it's not 100%…
Funnily enough, if collusion is prohibited, the goal of such a law would be more competition, but the result is more mergers and monopolies, up until the point where antitrust kicks in and ad-hoc limits the monopoly, so each industry ends up with 1 bidder, or 2-3 tops
I doubt it. USPS charges everyone to send snail mail, and I get plenty of spam in my mailbox. I end up with way more spam in my snail mailbox than in my email inbox, since the latter has filtering.
Sounds like a really fast way to kill a network instead of grow it into a 4B daily active user staple like email is today. You'd basically ensure that email would ONLY be spam, because marketers would be the only ones willing spend money to reach people.
Every time I see someone suggest micropayments on HN I have to wonder if people here have any understanding of how actual humans are. Turning every action on your network into a purchase decision is a good way to ensure nobody ever does anything on your network and thus it never becomes a network.
Humans will always gravitate toward the lowest friction way to achieve their goals. So immediately some private company would introduce a free communication channel as a loss leader instead, theirs would grow faster, and then they'd monetize via ads once their network reached critical mass (see also, whatsapp). Killing the more egalitarian decentralized protocol in the process.
My primary goal is not to send e-mail for free -- my primary goal is to have reliable, low-overhead communication with humans. Having this sponsored by spammers is a fine start, but even if I paid a dollar a year or so, that would be much lower overhead than even a day's worth of looking through spam is today (at the rate I value my time -- but even if you value your time orders of magnitudes less, the payoff is there).
Afraid the spammers will always be with us.