Apart from getting Tickets rolling, the other best way to get some free Roulette Tickets in Sol's RNG is to wait for the Santa to spawn, who will shower you with free tickets to spin. So, if you are unable to spot Santa or don't have any clue about the existence of such an NPC, here is a detailed guide about the character.
To answer the burning question, the Santa NPC spawns randomly on the map. There are no particular timing or biome changes that you can follow to identify/locate a Santa in Sol's RNG. All you can do is wait for a unique whistling sound, and then you can look at the sky for Santa dropping gifts from his sleigh. This whistling/jingle sound is an indication that Santa has arrived on your map with various wonderful gifts for Christmas.
So, what does Santa bring to the players? Well, similar to his appearance, the rewards from Santa are also extremely random and vary from time to time. But you can mainly use him to farm Tickets - Normal, Rare, and even Mega Tickets if you are lucky. You can then use these tickets to spin in the Roulette Machines, which can provide you with various gifts like Auras, Items, and more.
I recommend sticking to regular rolling for the tickets rather than depending on the Santa NPC, as his appearance is entirely random, and you must fight with other players for the dropped items/tickets. So, think of it as a bonus or additional way to get a ticket in Sol's RNg rather than a primary one. Also, I suggest using a private server to farm Santa items for a guaranteed drop.
For more on Roblox, Check out How to get the Pump King’s Blood potion in Sol’s RNG or How to farm Pump Tokens fast in Sol’s RNG
