Keep running it.
But you can cycle if you want to. Totally user preference. @HIT4ME i know uses it long-term as well.
At this juncture I am convinced it works for me. I think it would work better in terms of adding muscle mass if I altered my diet, which I am not willing to do.
Diet is high fat, avoid carbs, been doing it for over a decade. I won't go into details about the diet (too long for this topic), but "avoiding carbs" still involves taking in around 20g/day (mostly from milk and nuts).
I have a few cheat days/month, where I eat all the food I have avoided and crave. Normally, a 1 day cheat day adds 8 pounds to the scale, stomach bloating, I assume most is water. I urinate clear for 2-3 days. I return to my pre-cheat weight by day 6 at the latest and am in ketosis by the end of day 2. This has been consistent, like clockwork, for 5+ years.
Adding BMP, my weight steadily went up, it took longer to return to ketosis, I held more water but not in my gut, as my waist size decreased (overall and post-cheat day). Strength and exercise capacity has increased, not the equivalent of a good AAS cycle but above the rate I was gaining prior to adding BMP following the exact same diet, cheat days, and training regiment.
Unfortunately, I only documented weight and waist.
I will return to BMP after my next cutting/recomp experiment. If I continued the BMP into the next experiment, I will not effectively be able to validate the experiment.