This is simple, really. He's giving you the power to choose to engage. If you engage, you're interested, if you don't, no one is pestering you when you know you're not interested. W-W, really.
No, it isnβt. Prostitution has always existed.
Nothing wrong with paying for sex if itβs consensual & within your budget.
The one thing you shouldnβt pay for is LOVE.