The Ethereum launch process states that with the release of Homestead, the Ether mining will be at 100% rather than 10% of the usual reward rate.
Does that mean the full block reward would be 50 Ether? Or what is the full block reward?
That's an old proposal. The idea of having 10% reward in the Froniter launch was abandoned.
The Frontier network was released with 100% reward. The full block reward is and will be 5 eth (at least for PoW) even in Homestead.
You can also check the frontier-guide.
You're reading an article with old information that is no longer correct.
Homestead will be 5 ether per block just as Frontier is.
Also, this is a duplicate of: Will homestead increase Ether's issuance rate?