Yeah spark popped up a lot in my feed recently. But had not the time to look more into it.
You have a good article about it?
What are the cons?
Login to reply
Replies (2)
Basically it's fully surveilled by a very scary company: 
GitHub
No clear way to run an SSP without a business relationship with LightSpark? · Issue #64 · buildonspark/spark
This project seems to be gaining momentum and there are community concerns that both SSPs (lightspark, flashnet) are controlled by the same family....