Largely I agree with you, though I don't think your calculation of effort is quite complete. One factor that should be considered is the harm done by allowing the ads.
Facilitating the sale of a stolen phone is not going to be as harmful as facilitating, say, adulterated nutrition supplements.
This dovetails nicely with the full-on terrible and illegal side of things. There are likely not many ads for human trafficking on Facebook, but they are so horrendous that it is still worth expending significant effort to detect and remove them.
And while not comparable to the above situation, I would argue illegal Amazon land deals ads are causing an outsized harm compared to ads for similarly mundane-sounding illegal goods/service/whatever. They deserve special attention.
Facilitating the sale of a stolen phone is not going to be as harmful as facilitating, say, adulterated nutrition supplements.
This dovetails nicely with the full-on terrible and illegal side of things. There are likely not many ads for human trafficking on Facebook, but they are so horrendous that it is still worth expending significant effort to detect and remove them.
And while not comparable to the above situation, I would argue illegal Amazon land deals ads are causing an outsized harm compared to ads for similarly mundane-sounding illegal goods/service/whatever. They deserve special attention.