90% of proprietary apps: You need to have a phone number to use this app. In other words, you need to pay money and reveal your identity to a heavily state-regulated telecom company first, before you have permission to use this app. Then we'll use your number to track you across *every* app, for intrusive advertising purposes.

Nostr: You just need to generate a keypair on any computer better than a potato, for free, and then you can anonymously post to the whole world.