I know it's legal, but in my opinion it's really bad practice and can't seem to figure out why they did this. I could even see if it was a gfci feeding some downstream receptacles, but in this case it's not. Maybe someone is too lazy/cheap to buy wirenuts.
On a (commercial) job here recently someone had previously 'daisy' chained all the receptacles, basically if one of the receptacles go bad it will take out the other receptacles downstreamed from it. There are alot of them like that.
Only code restriction I know of is for mwb circuits where the neutral continuity cannot depend on the device, so in this case they are legal since its not a mwb. I kinda wish it was a violation with only a few exceptions (ie gfci)
Any one else wire their receptacles this way and if so why???