You are reading it wrong,
Well, I might be another one of those reading it wrong. Apologies in advance.
The first part baffles me. So bitcoin.org is now suddenly the source of Bitcoins?

I always thought the site was just informational.
Actually, yes. Bitcoin.org offer the option to buy bitcoin through a third party provider which is MoonPay:

It looks like 1win.pro are using one of those payment gateways that will suggest you some websites/exchanges from where you can buy cryptos when you click on
deposit. This feature exists even in some wallet apps.