I have played the game always in the browser. Now I found out that in the app there is an orange button and if you click there fast the winnings rise from 0.28€ to 0.87€.
I discovered this today and it seems you did it right and I did it wrong so far.
For those of you dealing with fast tapping problems, I recommend using Auto clicker by Xiaoyang. In it you can save the bullseye or click locations in configuration; good rate of choice is 20 clicks per second.
Could some fast tapper hit my link HERE? Or two slow tappers. O:)
What sale, gchart? Just took a peek at the AliExpress 2020 sales calendar, and nothing related there. However, tap on this link of CRI95 E27 7W spotlights and you will see it has a sale banner. Sale starts in ≈3.5 hours, or by April 28 00:00 AM Pacific Time. Some other items also feature sale banners, from many sellers. So it must be AliExpress random sale #whateverthey'vecameupwith.
Hit your last link Skylight, told me to @#$% off be group leader and bla bla bla (I started a round by myself this dawn, so no idea why is it this way). I guess I'll have to play a round by myself alone, and then I'll be able to contribute later. ¯\_(ツ)_/¯
Edit.- Sharing my current link anyway HERE, just got €0.28 despite filling the bar this time.