web3 marketing is so interesting compared to web2 

- you can see all wallet activity so you can be very targeted in your campaigns
- new distribution channels are seemingly popping up on a regular basis

As more activity will happen on chain, users will probably want to hide it due to open exploitation. Same happen in web2 social medias which had very powerful APIs that got discounted (eg, FB SQL)

/frametown citizen. Amusement, wonder, and uncertainty ✴︎ libred.org

this makes sense - is there a way to do that currently aside from the Tornado Cash's of the world?

Depends on the use case. Zero-Knowledge Proofs bring a great promise. For marketing purposes, it's very powerful as it allows user to specifically decide on what they want to share and what they want to keep private.