Rebates on yeast and hops question

[yewtah-brewha]

I over heard a couple guys discussing a scenario, of buy 10 packs get one free, so does any one know if you can do this? He mentioned saving the upc's on the packets and mailing in, what company's do this?

 

[teesherv]

They were probably talking about White Labs loyalty program. Redeem yeast labels. Check out different levels on their website.