[Crusoe123]

Why would you need a blockchain for this?

[philpem]

Indeed, a periodical subscription (say $10) with a number of posts or comments included would serve the same purpose.

Gee this sounds like telephone billing...

[bombcar]

And telephones are well known to completely free of all spam.

[FrenchDevRemote]

do you think spammers would pay with their own money? lol

[Vosporos]

Because they sell blockchain

[mbreese]

Not the OP, but I could imagine a system where instead of paying money, a sender might have to calculate a certain number of hashes. In this way, mining on a blockchain would be a substitute for actual payment.

There are many other problems with this (not least of which being the amount of energy required now just to send a message).

[throw__away7391]

As I recall Bill Gates proposed doing this for email in his book "The Road Ahead" in 1995.

[kennu]

The blockchain infrastructure allows decentralization of the transaction payments. Are there other ways to do that?

[_se]

The payment need not be decentralized for such a scheme to work (if it would work at all).

[kennu]

You're right, but I was specifically talking about a decentralized social network.