They have added a BUY STEEM POWER button on the front page.
That link was added like three months ago. shortly (maybe a week?) after the web site went live. Except in a very narrow sense it wasn't "added" and certainly not recently. Your post is trolling nonsense.
I agree that Blocktrades is usually (but not always) a worse deal than going through an exchange but it is also more convenient (no registration required, etc.) and that may be an okay tradeoff for small purchases.