Trendy growth-hacking ideas

Scrappy 1996:
Sent by Hotmail

2003:
Sent by Blackberry

The scrappy stuff of today is:
Open source
Kickstarter
Custom device / hackable
Sell online only
Free features / freemium aspects
Developer community / App Store
Robots
AI
Community around content
Google Voice native
Privacy/untrackable/uncrackable encryption
Disposable phone number
Invite only
Waiting list