I think having them as RRs was the only way they could get them in to CC tourney options as well as other WGT comps.
They add to your ranked rounds total but do not change your headline average nor count toward saturation of a tier for average thankfully.
They are a fun way as said of upping Hio and eagle tally, but they do also sadly impact on lesser stats being scrambling, sand saves, putting and best rounds. The latter being a system issue we seem stuck with.
Personally I am thankful for BoPar 3 only because it allowed me to bang the crap out of it to level up to 93 and get the R1. My penance is that my stats are rendered quite useless, but I have the R1 so ...........BoPar 5 I personally think is a great fun addition especially for MP and A/S.