"That extra effort is what gives traditional media its added oomph—typically 10-100 times that of a plain-vanilla email campaign"
This sentence is used in below paragraph:
They work because, to your prospect, it's a given that you've put in more effort. (A printed sales pack costs you more to put together; a telephone call takes 100% of one person's attention for its duration.) That extra effort is what gives traditional media its added oomph—typically 10-100 times that of a plain-vanilla email campaign.
I think that it means: extra effort can make the media more appealing. But the next part of the sentence is ambiguous for me:
- typically 10-100 times that of a plain-vanilla email campaign