Some sort of mutation. seen plants top themselves before too.
I'm not a fan. Leads to too much branching and over-crowding. End up with buds smashed together or worse an infection of some sort. More is not better with branching. The "right amount" of branching is what you want. This makes canopy management a bit more difficult to plan for. Too much branching leads to excessive competition for light and smaller, more difficult buds to trim as the total mass hits a ceiling and just gets distributed to more bud sites without any benefit to yield.
DLI and co2 causes vast majority of potenteial yield assuming the climate isn't a dumpster fire context. Number of colas is more about quality nugs and reducing risk of those huge primary colas that just have an elevated risk of fungus and microbial problems lurking underneath but look cool in pictures.
As far as your approach... have a target canopy and work backward from there. If they are useful, no reason to remove them. In addition to a scrog, i try to make the vascular tissue leading to each cola roughly equivalent to each other. E.g. a primary branch off apical meristem (trunk) supports the same number of colas, 2 in my case. 8 colas with equivalent vascular tissue leading to each. helps keep things even with less effort along with manipulating apical dominance of course.