"has since thrived" is correct and usable in written English.
It can be used when you are talking about something that was in a bad state, but then it improved and is now in a better state. For example: "The business was struggling when it first started, but it has since thrived and is now one of the most successful in the area."
Mr. Caruana's career has since thrived.
Eventually Nicky and her husband Phil, who come from Shrewsbury, moved Lizzy to an independent school, with small classes where she has since thrived.
Though die-hard crusties still wear "RIP COBALT" hoodies and refuse to set foot inside, the space has since thrived without losing much of its grit, and still hosts some of the city's best parties and live music.
They have since thrived under Cameron.
We carefully collected it into a fresh box, and those bees have since thrived in my garden.
Vampires, werewolves and zombies have since thrived, but these resolutely female mythical figures have been curiously under-represented.
Bain Capital invested in several companies at an early phase — Staples, for instance, and Sports Authority, two retailers that have since thrived — but it was not solely responsible for creating these businesses.
The community has since recovered and thrived over the past decade.
He has since gone on to thrive in the influential world of outside ideological groups.
Two of the actors from her second film, from 1972, were Oscar nominees, and her career has thrived since then; she has made several dozen films in a wide range of genres, but with a special place for comedy; she has been a crucial mentor for comic actresses, writers, and directors over the years, some of whom have taken their own significant places in the industry.
Indeed, Stoudemire has thrived since the operation and has played in at least 79 games in three of the last four seasons.
