La Habana in 20 Minutes

[Marksman_91]

5. This prosperity is likely due to the government loosening its grip in the economy

This BBC documentary explains it well

Basically, in the last few years, the Cuban government has implemented reforms which has allowed more Cubans to effectively make profit for themselves and build up their own businesses without government intervention. People can see it everywhere now, everyone can buy and sell houses, open up a restaurant, etc. This basically means that the strictly socialist regime that the Castros set up is effectively coming to an end, where privatized industry starts to become the norm. The Cuban people are actually getting a taste of capitalism now, and they are enjoying it, and it's very likely they won't go back to the old system again because of this.