First of all, reddit is purging all even slightly right-wing sub-reddits, it will soon be impossible for a sub-reddit to exist unless it's explictly left-wing, so an unimagineable amount of reddit trash is already flooding imageboards without your efforts to advertise there.
Second, it's literally not a problem who is invited here or from where but ONLY as long as the moderation is uncucked and will mercilessly ban whoever compromises the values of the original board. You purposefully ignored this part from my previous post because you perfectly understand that my whole argument rests on effective moderation, which means you're a sneaky manipulator, don't make me have to repeat it a third time for your dumb ass.
Third, the "mass over quality" accusation is total bullshit, it's not some universal law of reality that for something to become popular it should become shit as prerequisite and vice-versa. This is another manipulative trick on your part, because even if it were a real dichotomy, I would never want to sacrifice quality for quantity, but when you have less than 2 posts per day and some days with no posts at all, no new content worth saving, no posts worth replying to, no interesting conversations to read, no curious people who want to know what's going on, that is already a shit quality board because it's a dead fucking board, you can't go much lower than that.
If you're afraid of new blood coming and having the community grow, at this point you might as well get everyone's emails and take the conversation somewhere else, but I'm personally not interested in sitting on an empty board with one depressed asshole who moans and complains more than a bipolar whore on her period, if you can't bring any value, at least don't prevent new people from coming and bringing the value you're supposed to bring.