Well, there could be a bunch of reasons. Maybe the sales weren't great, or there were creative differences. Or perhaps the author had personal issues that affected the continuation of the manga.
Honestly, I don't know. You'd have to keep reading the manga to find out. The author might have something unexpected in store for us regarding Aqua's romantic ending.
The reaction of site.com to manga can vary greatly. It could be highly supportive, promoting and featuring manga prominently. Or it could have a more limited engagement, only showcasing selected titles. It all depends on their business strategy and target audience.
First, you need to visit the MangaUpdates.com website. Then, look for the manga section and browse the available titles. Click on the manga you want to read and follow the instructions provided.
Most likely not. www.reddit.com isn't a typical site for accessing manga like 'A Trail of Blood'. You might have better luck looking on dedicated manga websites or apps.