Hm, I've never seen this usage before, and I couldn't find any references to this phrase online. You can guess what the poster wanted to say from the context, a

Hm, I've never seen this usage before, and I couldn't find any references to this phrase online. You can guess what the poster wanted to say from the context, and interpret the phrase in your way, but to me, as long as there are several entities competing, no mater how far behind the follower is, it's still second in relation to the next higher up. The only way to satisfy "there is no second place to this stack" is for "this stack" to be last. If you wanted to convey that something is so incredibly ahead of its rivals, you could say "this stack has no competition" or "this stack is in a league of its own"