That's when A Pair Of 2 was officially formed, as I recall? They were doing stuff even before then, on bato.to, I believe. Went to a personal site/discord, but didn't come to Mangadex until 2020-ish with Blue Lock? They also had a lot more series before, but seems they've been DMCA'd or deleted series from their site since (it's been a long time since I visited their page, but I remember it having like, 40-something series at once time, definitely more than the sad 5 they have now; looks like they delete or at least hide from public anything older than a certain time period).
Far as I'm concerned, wish they took up a series that has lain dormant for awhile instead of an actively translated series, but I'm not gonna shit on them for this, since the quality is still good. The whole concept of "sniping" is BS either way, and revolves around groups like Jaimini's Box and Valhalla Scans and the like complaining because it reduced their income, but dolling it up to be about "respecting their original claim", like multiple groups can't each do their own translation of something.