Pretty much. My group did a little nasty surprise a few years ago before we changed our name and set all of our images as gifs. People could read it if they downloaded it but most of the sites that grabbed it with bots showed a loading icon on each page because their sites are not setup to handle gifs on their manga pages. This was one of the sites that ended up with the loading symbols lol. We don't do it anymore it was mainly our leader trolling the sites for a month or so.
Well yeah they probably do but it's their jobs. Authors(if youean them) work hard on drawing and the publishers give them their check you know?and all that jazz... If people just read it for free they don't really sell as much so no money. Less work for the author and eventually she probably gets fired. I would buy all these yaoi mangas I read if they where also available in the US but you know how it is...they should make a manga site like this one but with actual professionals and that you get to pay for more chapters :3
My group doesn't mind and we even upload to batoto ourselves. We just use to have a waiting period of a few days that sites didn't follow. Most scanlators stop translating a project if it's licensed and being released in their language. Exceptions are made for the incredibly popular series like Naruto, Bleach, One Piece, ect. The only other time is when the group doesn't care which is rude to the mangaka or when it's licensed in their language but the company holding the license ends up not releasing volumes in their language after all. That happens frequently. I buy as much manga as I can afford to support the mangakas and my group tries to buy most of our raws as do many other groups. I think sites like these promote reading manga and nearly everyone I've become friends with buys manga often after reading it on a site like this and loving it so much they just had to have it. I like reading something first before deciding if I want to buy it since manga is expensive. One volume goes for up to $16 usd here.
I'm going to explain this as simply as possible. Yes SOME sites do get their chapters uploaded manually. However MANY sites use bots that automatically rip chapters as soon as they become available just about anywhere. For those sites unless the site itself puts a block to keep it from pulling chapters of that manga it will keep happening. The easiest way to find out if a site is like that is to check for a manga you KNOW has a chapter that had a second release because of an error and see if that new chapter has replaced the old one. Granted you need to do it before it's reported and fixed manually but mangago uses bots. My own groups chapters are on here.