No, you need a BLOCK to get BTC. Basically the way I understand it is a mining pool takes a chunk of data at the current difficulty level and breaks it up into smaller pieces for the workers, using a much lower difficulty. A "share" is just a unit of work that your machine/miner completed and has submitted back to the pool for processing/inclusion.
I would like to be corrected if I'm wrong, but I view a mining pool in a very different manner (i.e., there is no work being split) -- I might also be viewing basic details of Bitcoin incorrectly, so...
Here is how I understand the mining of a given block:
1. The "Bitcoin network" has set a target hash
2. Someone (an entity) will at some point find some value that, when hashed with algorithm X (currently X = SHA-256), produces a value < target
3. The entity receives the reward for mining the block.
So, a mining pool would do the following:
1. The Bitcoin network has set a target hash
2. Everyone in the pool is working (basically a luck-based work) and producing tons of hashes
3. At some point, someone in the pool might find a value < target (same as step 2 before)
4. The pool receives the reward for mining the block
5. The pool distributes the reward according to how many hashes the individual produced.
Therefore it could happen that a person produced a single hash and solved the block, while someone else produced 100 Giga hashes but never found the solution for that block. This second person will receive a much much much larger reward than the person that actually solved the block by luck.
