"Information wants to be free," which means that any cost of producing that information can be abstracted away due to ideological inconvenience.
So you are either poor or too lazy to buy a book from the store. But this doesn't justify mind theft or it's distribution.
out of $20 book, the authors earn about $1 - $1.5, for e-books its about $1.7 - $2
The value from book sales goes to retailer and publisher: two large corporations, and in case of amazon - a single big corporation
so please cry me a river about amazon's lost profits earned at the back of the book authors
~25% VAT and then the publishers and retailers take their cut. The government takes another 40% in income and payroll taxes from that. The leftovers are what the author gets.
Buying from yourself is probably the biggest markup you can get.
its really might be better to publish for free and create a buy me a coffee
it is not a theft, because people using annas-archive were not going to buy a book in the first place and publishers incomes didnt drop due to annas-archive