Yes, it appears so. The link that leads to the official website still works, but the product advertised on that page is not eBookGold. Instead, they now offer GetResponse. I've inquired on the website, and eBookGold doesn't appear, which means it's either discontinued or transformed into the new product.
You can use the following link to sign up for a trial for GetResponse which works in the same way eBookGold previously worked.