Sorry to hear about your zero credits Verenice.
I have gotten plenty of zero credits too. But, from personal experience, hang in there. I had won a lamp at around 1:30am or so, like a week ago. The wheel is totally random, I do believe. I've heard that the chances to win a lamp are much better, the faster the puzzle is solved, when it is released for that time frame. But, there have been people in the Top 30 list that haven't won a lamp either.
Well, the new spinner prize wheel came out on 9-18. I had sent a Help Report 9-19, with just a question with regards to the odds on winning the Lamp. I can't remember now exactly what I had asked? But, I know I did ask basically if it was even worth doing the puzzles, like after hours (usually that's the only quiet time I have to do them). Which in turn would mean that the crossword puzzle had been out for 5 hours by that time. I figured why even bother solving the puzzle at that time, if my odds of winning a lamp were pretty much over. But ... if the odds were still in my favor, then heck I would certainly try!
This was the response from Vintage. I had sent the report on 9-19, so a day after the spinner was released. This was her reply: In a nutshell, odds are very random. Regardless if you're solving the puzzle hours after it's released, or right away -- everyone has the same odds. Hope that helps.