I can't join the Secret Santa and/or I got kicked from it!
You were late to join the event, so you can't join it now. If you got kicked from it, that was because you did not meet/follow the requirements. Those were
You needed to trade at least once in the past 3 months.
You did not have the Steam Guard Mobile Auth enabled, making you experience trade holds.
Trade Offer
Auto-Sell Hats
Automatically sell up to 100 of your eligible hats at once.
Don't worry: we won't take special items, including painted, low craft numbers, special levels, spells, killstreaks, etc.
Autosell Cards
Automatically sell up to 1,000 of your eligible cards at once.