If your targeting is machine learning driven and linked to other databases so you can create 100k+ ads with optimized variations all linked to A/B style tests t

If your targeting is machine learning driven and linked to other databases so you can create 100k+ ads with optimized variations all linked to A/B style tests then that targeting is extremely useful. Maybe peoples responses give you enough to then followup with cold calls/direct mail etc. Frankly there is way too much that can be done by combining different data and ML that the traditional way we think about preserving privacy is insufficient.