However, as good as these services are（让步状语从句）, there are simple steps we can take to keep them at bay.（主句）

这是美国英语用法。演变如下：

However, though these services are good, there are simple steps we can take to keep them at bay.

= However, good as these services are, there are simple steps we can take to keep them at bay. （把表语good 置于as 之前，这时as 表示though 之意，当然这里用though 也可。）

= However, as good as these services are, there are simple steps we can take to keep them at bay. （为了读起来顺口，美国英语再加上一个as）

在美国英语中，通常使用as...as...引导让步状语从句。例如：

As cold as it was, we went out.

= Cold as it was, we went out.

= Though it was cold,...

尽管天气冷，我们还是出去了。

As successful as he is, he is not proud.

=Successful as he is, he is not proud.

=Though he is successful,...

他虽成功了，但不骄傲。

（下面，是张老师在QQ 群里发的一个截图，碰巧我看到了。可以作为解答该问题的一个很好的辅助材料。）