Binance will pay you for writing when what you write triggers a click and a trading operation, that is, if your writing generates a transaction within the platform, so don't just go posting randomly, because that's not how it works.
On the other hand, the points are discount coupons for commissions on spot trading, and they are valid for 14 days; if you make a transaction, you use the coupon to save on that, that’s how it works.