JetBlue is offering a unique opportunity where you can purchase the rest of the points you need to qualify for JetBlue Mosaic status, which will then give you status through December 31, 2018. This opportunity is good for those who just missed earning status as well as those who are looking to just buy status outright. This promotion is running through December 31, 2017.
Purchasing the points towards status is pricey, so I only think it is only worth it if you are slightly shy of reaching status, but the value depends on how often you’ll use the benefits. My favorite Mosaic status benefit is the option to change or cancel your fight with no fee. Or, if a flight goes down in price, you can get a credit for the difference or the point difference back into your account.