Freebies are a standard sales tactic, and the quality ranges from genuine breeder packs to leftover mystery stock nobody could sell. It is worth checking whether the freebie is labeled as feminized or regular, since a random regular seed in a feminized run can quietly pollinate the whole tent. Which vendors currently include named feminized freebies, and which hand out unlabeled seeds, is tracked at https://queenfeminizedseeds.com. Treat unknown freebies as practice material rather than a main plant.