Note that if you just deposit 24 UST you won't receive any ticket, but if you deposit an additional 1 UST later on, you'll get 1 ticket (in these cases you will not get to choose your lottery ticket number, it will be generated randomly). Similarly, if you deposit 40 UST followed by another deposit of 40 UST, you will receive 1 and then 2 (for a total of 3) tickets respectively for those deposits.