If you’ve ever downloaded the hit mobile game Candy Crush Saga then the chances are that you’ve either become a hopeless addict of the colourful puzzle title, or had to rid your device of it in order to get some work done.

Yet while Candy Crush may have hampered the productivity of many users, the game has transformed the fortunes of its producers King Digital Entertainment, who are set to be bought up by US gaming giants Activision Blizzard in a $5.9 billion deal.

Released in 2012 by Dublin-based King, Candy Crush became a huge hit and the most downloaded app for Apple devices in 2013. Free to download, King monetised the title with in-app purchases. Despite some 97.7% of users playing for free, the 2.3% paying customers spent $1.04 billion in the second half of 2013 alone.

The deal represents the largest ever acquisition of a mobile gaming firm and is one of the biggest ever seen in the gaming industry as a whole, dwarfing Microsoft’s $2.5 billion purchase of Minecraft producer Mojang in 2014.

Industry experts are divided as to the merits of the takeover. King have so far proved unable to launch a follow-up title that comes near to the success of Candy Crush and there is a fear that they could be a one-hit wonder, mirroring Finland’s mobile gaming leaders Rovio’s inability to replicate the success of Angry Birds.

Jefferies & Co were amongst the analysts that expressed doubts over the merits of the acquisition. "We expect a heavy dose of scepticism from investors especially given the large deal size.”

Despite this warning, the brokerage still recommended buying Activision shares. Other analysts were more upbeat, with Cowen & Co claiming that the deal was “an absolute steal.”

“The combination increases Activision's scope and scale, but more importantly gives the company another top-quality IP creator.”

Activision will certainly be broadening their user base with this purchase. In total, the combined company will be able to boast of over 500 million active gamers across the globe.

It also gives them access to unchartered territories. Activision’s success has come in PC and console formats, with their titles mainly appealing to male players. King are specialists in mobile and online gaming, with 60% of their users being female - a notoriously difficult market to capture in a male-dominated industry.

Another reason why this deal makes sense for Activision is their history of sustaining hit franchises. They are the masterminds behind such blockbuster titles as Call of Duty and World of Warcraft, which they have developed into annual money-spinners. With this in mind, perhaps King’s potential to develop another hit to match Candy Crush becomes less important. This is a goose that has already laid a golden egg.

The deal is set to be completed early next year. Only time will tell if Activision have made the right move, but what’s clear is that the small screen is increasingly becoming the home of big business.