Seems like a lousy design to me - think about how easy it is to rip one of those off of the PCB. Not only are they surface-mount (thus the only thing holding them on is the epoxy from the lamination process holding the copper pad to the FR4), but they’re not connected together so they can’t rely on the group strength of the row of pins.
Just awful - I see very little benefit to such a design.
If you really wanted to shave off space from the PCB you could do a castellations (see [here if you aren’t familiar with that term) on the edges of the PCB and solder normal through hole pin headers into those.
If you must use these surface mount pins at least put some vias on the pad to hold it down some.](http://www.ami.ac.uk/courses/topics/0134_sp/index.html)