The "manosphere" has existed for about 20 years but I strongly suspect glowies overtook it in the past few years, around the same time it was flooded with niggers. Twenty years ago the average manosphere personality was a middle aged White guy that used mythopoetic images of cowboys or knights in shining armor as his thumbnails. Today the average manosphere personality is a nigger in his 30s and his thumbnails are all women's asses. One of the niggers on "fresh and fit" admitted he was once an agent with the State Department.
You're correct, there was absolutely a push by glowie types to overtake the manosphere, fill it with niggers and subvert young White men away from White Nationalism. But it's not clear how well it's working. Whenever Andrew Tate (son to a literal glownigger) or fresh & fit and other "Red Pill" types have audience meet-ups most of the young men are nonWhites.
Most young White men have given up on Hustle and Grind culture as well as pursuing relationships, let alone sex, with women. They're retreating inward, sometimes in a healthy way like becoming more religious or becoming more focused on their fitness or health, or less than healthy timesinks like anime tiddy and vidya