Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
login
jsonne
on March 6, 2016
|
parent
|
context
|
favorite
| on:
How Duolingo got 110M users without spending on ma...
What it comes down to is this. Spend money on marketing, or don't, but always focus on ROI.
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search: