Resources on unconventional growth hacking strategies

I am writing a blog post on growth hacking strategies, checked out a bunch of blogs on google from Neil Patel to Rohan Chaubey, and found some recurring examples - AirBnB, Netflix, Dropbox, etc. But I am looking for unconventional strategies. I scoured all of Reddit communities found some great tools too but if there's anything more you can suggest, it'd be great!