Some of this years top influencers were happy to disclose their going rate for a sponsored social media post. Rachel Brathen, the most sought-after yogi on the internet, commands upwards of $25,000, for example. Fellow fitness influencer Lyzabeth Lopez, creator of the Hourglass Workout, charges between $3,000 and $5,000 per post, and between $20,000 and $100,000 per campaign. Others were more tight-lipped. So …