These markers just show scramblers that, at this point at least, the route is directly on the ridge. At a point like this, look for the next marker - with something as steep and exposed as this ahead, the route may very well leave the ridge at this point.
For the record, at this point I'm looking back at where I came from. I'm not sure anymore, but I think the route went off the ridge, on the left side of this rock.
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