Same as what is said in the comments below the article:
"it's the same protocol as bitcoin so every other miner can join and the reason right now miners are not many is only because it's new and not many miners support it."
"New coins tend to start centralized. As new participants join that changes. Bitcoin started with only 1 person mining it. If BCH can't get more people on board then is not worth it but it's too early to pass judgment."
"This was expected at the start due to the difficulty. As the difficulty adjusts and it becomes profitable more miners will join. For now, yes it's a risk but BCH should outgrow this shortly."
This is an experiment. Only time will tell.