You can advertise on Big Tech, but
Don't organize using Big Tech.
Don't use Big Tech services to support vulnerable populations, this is putting their safety at risk.
Use alternatives that respect your and their privacy. This is essential for safety.
@Em0nM4stodon /me taps the sign,
“For the master’s tools will never dismantle the master’s house. They may allow us temporarily to beat him at his own game, but they will never enable us to bring about genuine change. And this fact is only threatening to those [people] who still define the master’s house as their only source of support.”
(yes, it's originally about feminism, but it really applies to Big Tech in a big way.)
Em 
Internet Rando