Shares of cloud storage and e-signature company Dropbox (Nasdaq: DBX) fell 19.8% in the morning session after the company reported fourth-quarter results that missed analysts' expectations for billings, though revenue came in ahead. The results revealed a lot of challenges with the business. Management noted that customers are being more cautious and exhibiting "higher levels of price sensitivity." This drove "reduced levels of gross new licenses and upsell activity, alongside higher churn and d