It depends on your company. Are you geared toward creating shareable content that appeals to your target market? Then social medias is definitely a viable user

It depends on your company. Are you geared toward creating shareable content that appeals to your target market? Then social medias is definitely a viable user acquisition strategy. Just look at Upworthy (although lately they've been dinged by Facebook, apparently). But if your social media strategy is to just create a Twitter/Facebook account and put out a few random blog posts, then don't expect that channel to bring in a consistently large amount of users.