VIP Servers (Previously known as Private Islands) is a rental perk in Miner's Haven worth R$85 every month you wish to have it active. It allows to play Miner's Haven on your own island, and awards you a Pineapple Refiner, 100uC, and a few (3) Unreal Boxes. VIP Servers were added in the Outdoors Update. Because the price was originally going to be much lower, Play Solo was released on 5/21/2016.
Private Islands was a feature in Miner's Haven were you could pay R$10 to play on a personal server with its unique map, and purchasing a Private Island for the first time would award you a Pineapple Refiner. This was removed because it was known to delete your base and everything in it.According to Berezaa's Twitter, Private Islands were actually shut down due to what was arguably a more critical glitch than a total loss of all things deployed on your base: the ability to duplicate entire items, up to and including highest-tier items.
The validity of this statement has never been confirmed as it technically conflicts with the above other reason Private Islands were removed. Berezaa removed it in the 2015 Spooky Update and said he would bring it back in the next update but kept pushing back the date of its return until May 2016 when he brought it back as VIP servers.