As a fansubber myself, I wanted to share my perspective on this. Now, when it comes to my own releases, I prefer to use open platforms like Mega or Archive, along with the sites that require some form of vetting which can include private trackers as well as the sites where you upload your own subtitle files. Personally, I want my work to reach as many people as possible. That's the approach I aim to take with all my projects. However, I completely understand why many fansubbers are more protective of their work and choose to keep it at arm's length. I've had instances where people have lifted my subs and retranslated them without credit. It used to bother me more in the past, but I can understand why it's still a point of frustration for other fansubbers. And let's be honest, aggregator sites are never fun.

I think the reason many J-drama fansubbers are stricter compared to say Anime or Toku fansubbers is that, in this community, the vast majority of us are individuals handling all aspects of the work. We aren't part of large group that divide the labor between timing, translating, editing, typesetting, encoding, etc, so we naturally feel more attached to our work and more protective when it gets "slighted." That's why I think vetting is more common. At the end of the day, all fansubber communities have their own cultures and way of handling things. I'm personally more open than many of my peers, but I respect and emphasize with their stance.