Incubators are Bullshit, Startup Accelerators are Scams
Barring few in US and India, you can put the rest in the above two categories. Most of the people running these incubators/accelerators are there for Kicks, Greed, Ego and Entertainment only and themselves don't understand the challenges of building a business. Unfortunately most of the startup founders are too naive and in hyper state of mind so get sucked into these.