1) Unrelated to the scantalators discussion. But perhaps something to note.
Fans often think that mangakas are making a lot of money. That really depends. There's a huge disparity between mangakas who "make it" and those who don't.
There are two main ways mangakas make money.
First is the "per page" system where they get X per page. Even these are usually just hitting $100 per for the not as famous mangakas.
Now, if your series is a weekly (Like Jump) maybe you can make "$ x 20ish pages x 4" in a month
The other main source of income is the royalty from the sales of Tankoubon.
With so much "free manga" out there, it causes the simple economic phenomenon of "free riding". Why pay for a book when you can read it online?
Unlike YouTube, there aren't any ad incentives for the mangaka to make money "per view". Every scantalation view goes into ad revenue for the hosting sites.
And that's straight up selling the creative license to their work for an anime, merch, or god forbid, a live action.
But with licensing, mangakas don't actually get a "revenue share".
So a "fan" who reads scans, then buys merch at some con etc, doesn't actually contribute to the mangakas bottomline but is giving money to the license holder.
First, mangakas are hoping for a residual effect where people who consume the anime/live action will hopefully buy the Tankoubon as well.
Second, if a mangaka can prove their works' popularity, they can negotiate
But what's the reality?
The correlation between Tankoubon sales and licensing isn't as big as many hope to be. Especially with live actions, japan's recent rush of trash quality live actions with idols and Johnny's actors, mean that the
Good example will be Gintama. Gintama's anime was very well done and comedic, so a lot of the anime fans went on to buy the manga.
With the live action, it targeted a completely different viewership.
Saving grave was that the movie was a surprise hit. So the sequel will mean additional license fees.
A lot of mangakas aren't as lucky to have their licenses renewed for sequels etc. (there are countless anime gems that ended in just one season).
So Tankoubon sales really are the only forms of royalty payments.
The Japanese tax code is really unfriendly to "freelancers" (mangaka included) who work from home.
Most published mangakas aren't always a one-man/woman army.
That rules out studio rooms. In other words, you need at least a 1bedroom place to claim costs.
Because futons can be folded, a lot of single Japanese people live in one room places because it's minimalistic.
And for the actual tax filing itself, mangakas have two ways to file their taxes as a sole trader.
Even then, as "freelancers" there are many business related costs that can't always be written off as sole traders
So Yea, there are mangakas out there who are making bank.
Piracy for manga and music can't really be compared. Musicians who have their own YouTube channel etc can somewhat control the distribution of their music. There isn't exactly a "language barrier" for pop music either.
Statistically, popular artists have a Concert/CD sales earning ratio of 70/30. That means, touring a lot = more money.
The fame and exposure that comes with it often leads to other collabs, more songs, record deals etc. Because a lot of musicians are in the Fame Biz.
Their royalties from their book sales ARE their bread and butter. There is no equivalent for a "concert" for a mangaka. And there's only so many "licenses" you can sell, unlike a musician who can tour as many times as they want.
The overseas market is already saturated with the scans.