Oracle would probably sue them for piracy or something. If you bought it, they would probably say you violated the agreement and no longer have a valid license.
Not saying it's right, but since it's commercial software, they can probably play some tricks. It's one of among many reasons to use commerical software where possible.
http://www.oracle.com/technetwork/indexes/downloads/index.ht...
http://www.oracle.com/technetwork/licenses/standard-license-...
Of course there's the anti-benchmarking clause, but other than that, they offer the downloads free (as in beer).