Seems fair logic and I once won the grand prize on a lottery, it was only a small locally run one but still thousands of tickets and my 1 ticket won the biggest prize ( I only arrived just in time before tickets closed so figured I'd get one just like that). Havent been as lucky since that day :p Thing is buying just 1 more ticket, doubles your chances and the literal cost between 1 or 2 is still quite small hence for this strategy I would add at least 1 more ticket to make it doubled in luck obviously still very slight odds. Of course I prefer the Rolex at this point, if only for the bragging rights of getting those odds won.
It seems to me that we shouldn't bother buying tickets for the weekly lottery at all. If a user is lucky enough, the number of tickets he gets from the wheel of fortune, free rolls, or the hi/lo game will be enough to win the lottery. Of course, I understand that many users can systematically spend 1, 10, 100, 1000, or more sats to buy lottery tickets and don't worry about the result. However, if these users check their statistics on the site after a while, they will be disappointed by how many sats were spent for nothing.