"If you're trying to get a certain prize, be on the look out for two restocks around 1:00 PM EST on Tuesday and 4:00 PM EST on Wednesday. Farewell!"
for people who are still curious!^
assuming ticket sales reach 300, you'll have about a 40% chance of getting one
20%
1/10 + 1/10 + 1/10 + 1/10 + 1/10 = 5/10 = 20%
that's not how stats works unfortunately, that'd mean that pulling 10 tickets would give you a 100% chance of winning (which is obviously not the case).
the chance of you losing a pull is 270/300, there are 5 pulls, the case that you don't win any pulls is (270/300)^5, 1 minus that is the probability you win at least 1 pull and get the weird doll (about 40%)