It appears that the medical marijuana shops in San Jose are threatened with being legislated out of existence. To combat that, they have decided to give reduced, or even free, marijuana to voters. All they need do is prove they voted and have identification that says they are able to obtain medical pot. The dope shops are trying to pack the local town council in order to have the business environment more conducive to their kind.
http://www.nbcnews.com/news/us-news/san-jose-dispensaries-offer-free-pot-voters-n119511
Clever. I'm guessing that it's not illegal since the shops can't know how the person voted before walking in and asking for his/her discount.
The article actually states that giving something to a voter for their vote in a Federal election is illegal. In a local election, I believe the article also states, those opposed to the giveaway are looking to see if it is illegal on that level as well.
Just a fun little exercise. I scored 60%. National average is 45%.
http://www.csmonitor.com/USA/Elections/2011/0104/How-much-do-you-know-about-marijuana-Take-the-quiz/Indigenous-marijuana