SLOP
As a tool to assist in increasing the safety margins in MNPS airspace by distributing aircraft laterally and equally across 3 available positions (centrline, 1R and 2R) I tend to offset on every sector that I am PF. Before applying the offset I apply a bit of common sense and try to see what other aircraft on my track are doing by using TCAS and the good old Mk1. It is reassuring to see those other contrails way off to the left of me.
NATS figures for aircraft in the Eastern portion of the North Atlantic show a disappointing frequency of offset by airlines - less than 10% compared to the hoped for 67%. (AT least those were the most up to date figures I could find. Anybody 'in the know', know better)?
Anything that increases your safety and reduces your chances of wake turbulence encounters has to be good, I sometimes even use SLOP on random routes.
Considering applying offset is encouraged by the company and is up to the pilot to apply as he/she sees best.