I read an article that ESPN Insider is merged into ESPN+. They are both $4.99 per month. However, if you are an Insider, as Zippy5 mentioned, you will be grandfathered into ESPN+ with the same price plan. Yearly is $49.99 for ESPN+ and $39.99 for Insider. I'm wondering if it might be worth joining Insider and being grandfathered in to $39.99 per year ($3.33 per month).
Here is the link to the article.
https://variety.com/2018/digital/news/espn-insider-switched-to-espn-plus-streaming-1202911642/