They didn't say you could get 3k to spend on the week of patch 5.2s release. They said you would be able to get 3k valor BEFORE 5.2 goes live.
The announcement was made on Wednesday the 13th so if you capped valor in the week that announcement was made then the only way you could earn 3k valor BEFORE 5.2 goes live is if it comes on the 5th/6th of March.