Technology

Discord doesn't require a phone number to use it and there's tons of servers that don't require phone number verification. The vast majority of servers I'm in have no phone number requirement. Signal straight will not work without your phone number, in any capacity. I'm sure you'd trust Signal over Discord with your phone number any day of the week but as I said, that's an irrelevant point because we're talking about why people are more attracted to Discord over Signal. Slacks vs ugly cargo pants.

I said that the reason they DONT is because other platform dont have the advertising budget, nor the user base to make users jump ship.

Have you ever seen an ad for Discord? I haven't see one before and I only know about it through word of mouth. There's nothing stopping people from creating Signal groups for various hobbies and including a Signal link in their social media page.

Refusing to use Discord might be noble from a privacy/security point of view but from a broader perspective, you're significantly limiting your social interactions and not because of the people but the app the people are using to communicate with. It's like not using a phone at all because pretty much any phone is a privacy/security issue.