Raffles

used tickets stay spent, but if you don't win, each silver, gold or ultimate ticket you used gives you free gacha pull credits when the winner is drawn. Normal tickets give no consolation pulls, whether you bought them with points or used them from your inventory.

for example, using 2 silver tickets and 1 gold ticket would give you 4 free pulls if you don't win at these rates. It's per ticket, not per draw entry.

I can adjust these rates. The rates in effect when the winner is drawn are the ones used, even if you entered earlier. Unused tickets in your inventory aren't affected.

no, points spent buying tickets stay spent after the draw, whether you win or lose. Those purchases don't give consolation pulls. The exception is if I cancel the raffle before its countdown starts: then your points are refunded and any tickets you used from your inventory are returned instead of becoming pull credits.

they're added automatically when the winner is drawn, not when you enter or when the countdown starts. If you receive any, you'll get a notification. Visit the gacha and use the pull button that says it uses a credit. Each credit pays for one pull without spending points. These are extra pulls, separate from the daily free pull.

you get the raffle's prize as a commission voucher in your inventory. Check the raffle description for what I'll draw. The winner gets no consolation pulls for any of their tickets in that raffle, even if they used several.

one winner is picked at random. Your chance is your total draw entries divided by everyone's total entries. Ticket weights are listed above, so higher tiers give you more entries, not a guaranteed win. The odds shown on the raffle can change as more people enter.

each ticket you buy in the same raffle costs the base price multiplied by your purchase number. If the base price is 10 points, your first costs 10, your second 20 and your third 30. Each still adds just one entry. Inventory tickets cost no points, don't raise that price and don't count toward the purchase limit. You can use at most one ultimate ticket per raffle.

the countdown starts once enough points have been spent on tickets to reach the raffle's goal. Inventory tickets don't move that goal along, so there isn't a set draw date before the countdown starts. You can enter for the whole countdown, right up until it ends.

you can't withdraw an entry. I can edit or cancel a raffle before its countdown starts. Once it starts, the terms are locked, I can't cancel it, and I can't draw it early either: choosing when to press the button would mean choosing between winners, since the number is already locked and the entries are public. The winner is drawn when the countdown ends.

short version: I can't pick the winner, and you don't have to take my word for it. every raffle from now on records its draw, and gets a "watch the draw" button when it finishes that replays how the winner came out and publishes the numbers behind it. raffles that ended before I built this don't have one, because I wasn't recording them yet and I'd rather say that than fake one.

the long version, for anyone who wants to check the maths:

1. before the countdown starts, the site generates a secret 32 byte random number (the seed) and immediately publishes sha256 of it on the raffle page. that's a commitment: the hash can't be reversed, but it also can't match a different seed later, so the number is locked from that moment.
2. tickets keep arriving for the whole countdown. this is the part that matters: when the seed was locked, the final entry list didn't exist yet, so there was nothing for me to aim it at even if I'd regenerated it a million times.
3. when the countdown ends, the entry list is frozen: every ticket oldest first, repeated once per entry it's worth, then shuffled with the seed (fisher-yates, where each swap index comes from sha256 of the seed, the word shuffle and a counter). the winning position is sha256 of the seed and the entry count, read as one big number, modulo the number of entries. the seed itself is published at the same time.
4. you check it: hash the published seed and compare it to the hash that was on the page before you bought your ticket, then redo steps 3 yourself. every input is at /raffles/<id>/draw.json: the hash, the commit timestamp, the seed, the full frozen ticket list and the winning position. any language with a sha256 does it in about fifteen lines.

the animation is drawn from that winning position, not the other way round. it never decides anything, so nothing about how it looks can change who won. one consequence I'd rather say out loud than have somebody find: once the number is locked I can't draw a raffle early either, because with the seed fixed and the entries known, choosing the moment would be choosing the winner. the countdown runs out on its own.

what this doesn't prove: that the ticket counts are real. that comes from the points ledger, which is a separate thing you can see in your own history. what it does prove is that I couldn't have picked a winner after seeing who entered, re-rolled until a favourite came up, or changed the result afterwards.

no, you just need to be logged in with a linked pixiv account and enough points or an available inventory ticket. Banned accounts can't enter. Anyone can browse the raffles and read the results.