I agree with @Dirty_Nurse. I don't think they are going to go back to untimed boosters. The newer games that I am familiar with have them. It probably makes it a lot easier for them in terms of the information they have to maintain for each user, which is especially important for users who purchase boosters.

Once the timed boosters appeared for me, I stopped playing CC because I could no longer play it the way I wanted to (and have been for the last 3 or 4 years). I went back to a couple of other King games, one of which, CC Soda, has the timed boosters. They're just as useless in CC Soda as they are in CC. So why do I continue with CC Soda, and not CC? Because I was attached to CC and they way I played it. I am not attached CC Soda. If I stopped tomorrow I wouldn't miss it; I'd find something else (I actually play because it helps to lower my blood pressure.)

Yes, a lot of people have been vocal about the timed boosters. However, what percentage is this of the total number of players, and does that really change their bottom line. I'm skeptical, and so I don't think we'll get the change reversed. But I'm quite happy to be proved wrong!

Play the old flash version. You get regular boosters for collecting sugar drops. You will receive double the amount of sugar drops for passing a sugar drop level. From your computer or laptop go to https://king.com/play/candycrush. You may need to register/sign-up if you have not already done so. This link takes you to the old flash version of candy crush. If you see the dog, click on the dog or below the dog on the rectangle where it says "Get Adobe Flash Player." This will bring up a box where you can allow Adobe Flash to run. The example below is shown on the Microsoft Edge internet browser. Browsers vary, this may look different, the message box to allow flash player may appear in a different location. Also, our computers/laptops have different graphics cards, configurations etc. I can get the old flash version to work on a variety of  browsers but for me it will not work on Firefox. On Maxthon it just works, goes right to the game, no dog. On Opera "Click to enable Adobe Flash Player" appears in the middle of a blank screen. I do not know what browser you use? Boosters received on the old flash version sync with Win 10 and the HTML version but not with your mobile. Gold Bars sync everywhere.