My point is that it doesn't make sense for a company to enable others to compete with them.
The main point that mining is becoming centralized still stands, as evidenced by the link that notlambchop posted.
Thanks for bringing this to my attention. This is further proof that mining will be controlled by a handful of big players in the future.

You do know that likely the biggest mining company out there, BitFury, sells industrial mining gears to other miners. I would say this qualifies as "enabling others to compete with them". They actually offer the service of building data centers and supplying mining equipment for mining operations i.e. other Bitcoin miners.
In fact, every mining companies in the ecosystem probably mine Bitcoins themselves AND sell mining gear. So your point really doesn't make any sense, at all.