"Todd here knows everything about you to keep his site safe."
Not that I feel unsafe, but maybe that sentence is a few words longer than necessary. Right now LP is storing a bit over 26 MB of data in my cookie folder. All of the incarnations of Google and YouTube combined are storing less than half of that.
"Isn't the central computer the one that creates the RNG winning numbers after all the ticket terminals are closed?"
If reading isn't unusually challenging you might go back and read the reply from cottoneyedjoe, in which he explains that.
IIRC, as far as we know there has been only one person who deliberately manipulated RNGs to affect the drawing results. It was done on just a handful of drawings and to benefit himself and friends rather than to prevent others from winning. Because those drawings guaranteed a jackpot winner we can be fairly sure that the manipulation reduced ticket sales.
There's also a thing called probability, and the lottery relies on it very heavily. Among the many things that probability does is it tells us how many winners are likely based on the number of tickets that are sold. That means that if there's a big conspiracy to reduce the number of winners then some conspiracy theorist should be easily able to find the data that shows too few winners. Of course that would require a conspiracy theorist that actually understands probability, but based on what I see around here the people who post about "unlikely" occurrences usually don't have a clue how likely those occurrences are.