Sure. Probably would work well with name+newsletter@example.com type filters.

I just like to keep them separate, I suppose. And, I just naturally prefer to consume news through RSS feeds. Every newsletter or RSS feed I read is ephemeral, disposable, and I probably only ever read 1% of the content (if that). Email (for me) tends to be the near opposite, and anything I can do to keep the noise and cruft out of my email, I'll do.