if your getting lottery tickets from free rolls is disabled, and you have just 2 WoF spins per day on average, there are some weeks when you have zero lottery tickets.
This is possible, but it's very unlikely.
Each time you play WOF, you have around 33.4% chance to win lottery tickets.
So, the chance to not win any lottery ticket each time you spin the wheel is around 66.6%.
Assuming you play WOF, 2 times a day and 14 times in a week, the chance to not win any lottery ticket in a week is only around 0.338%.