Context matters a lot here.
There's a meaningful difference between a site that exists purely as a gambling spam hub and a legitimate site that happens to have published a handful of genuine relevant articles on the topic among hundreds of others.
The latter is completely fine in our view, and applying a hard rule either way ignores that nuance.
For DFY orders, we assess every site across our full 23-step QC process. No single content category triggers a pass or fail — everything is evaluated in context. If a placement cleared our review, we're confident it's a quality link.