@Purplelibraryguy Well, these people called themselves "The Avengers" till a few weeks ago. And they showed up in the scanlation scene for the first time right after Mangastream closed doors. They're said to be basically remnants of MStream, but I cannot vouch for the accuracy of this info.
In that case, they're probably doing what MStream did, that is, mainstream popular manga. I can't really think of why, either. Perhaps they just like all these series, aren't satisfied with the work other groups are doing, think of their version as authoritative and want to get it out. Or maybe they hope to gather strength to release faster than the other groups in the future, and are in the process of getting personnel to do just that. Scanlators have the darndest reasons to do things.
Mangastream never cared much about manga that weren't popular, to the point I hardly ever read anything they did. If it's true that this group have succeeded them, perhaps that's also their mindset.
If we consider that Yona has at least one speedscan early version that only gets out in Imgur/Reddit, plus a couple of text-only summaries that get out even earlier (including by the original Titania translator, sora-san), depending on how you look at it, both groups' efforts are redundant. People are strange like that.