Why do most writing platforms fail to help writers actually earn?- Seeking Advice

I’ve been building Tinnotu, a platform where writers publish articles and earn from impressions and writing quests.

While talking to writers, I noticed something interesting.

Many writers say they’ve tried platforms like blogs or publishing sites but rarely make any money from their writing.

So I’m curious:

Why do you think most writing platforms struggle to help writers earn?

Is it:

• Lack of traffic
• Poor monetization models
• Too much competition
• Something else?

I’d really love to hear perspectives from people who’ve built or used creator platforms.