In my niche, some of the best targeted ads are also pretty scammy so I filtered them.

Being very well targeted, said ads get a relatively high CTR. But they also seem to be on a big budget, so they get away with a relatively low CPC. All in all, filtering them didn't seem to affect the RPM - at first.

Now I'm not so sure anymore. I'm afraid I might have gotten smartpriced (RPM roughly 50% of what it used to be a year ago). And this is why I suspect smartpricing: without those well targeted ads, my website has a lower CTR and (probably) a lower conversion rate than the average website in my niche. Could this constitute grounds for getting smartpriced?

I could just remove the filters on some of the scammy ads, but I would hate to expose my users to them. On the other hand, if I don't try I will never know.

What do you think guys? Any ideea / suggestion / personal experience?

Thanks,
Asterickx