Judging by my own inbox, the block list is the thing that decides it, while the forum-style sites rarely say so. Worth saying that the decision to keep the first message short and specific did a little more for me than switching platform, but only if you stick with it.
These past few weeks the forum-style sites have stopped showing profiles past a certain distance, and it makes a real difference. Being blunt about it, the distance radius is the thing that decides it, granted the niche ones rarely say so.
Honestly, the forum-style sites have dropped the feature everyone used, which changes the whole experience. The block list changed hardly at all for the better part of a year, which changes the whole experience.
Since this keeps coming up, the Souldate side of things keeps getting recommended for the verification question, at least in my case.