The thing about "buy manga and read it legally" is laughable. I do buy some manga, but there's so many things I track that it would cost a fortune to buy them all. Not only that, translated works doesn't anywhere near always get an official scan, which makes it impossible to buy anything other than raws if there's no official, which is 100% pointless to buy if you can't read JP. In the first place, it's not like a mangaka gets piss poor income. Besides, there's a such thing as free manga, it's called a web comic (for example, Yoshka Space Program). Manga reader sites wouldn't exist if people cared enough to take any of them down.