Announce the prize before you open entries. Chat participation spikes in the first 30 seconds after an announcement. Lead with what they can win, then how to enter.
Keep the keyword short. !enter or !win beat long commands, especially for viewers on mobile.
Ride the gifted-sub trains. Kick's gift-sub culture is a giveaway engine on its own. With sub entry on, a gifted train fills your pool while the hype is already happening, no extra ask needed.
Use the data-backed defaults. Across 52,000+ analyzed giveaways the typical draw runs about 13 minutes and most draws pick a single winner. Kick isn't Twitch, but viewer behavior around a live draw is close enough that 10 to 15 minutes of open entry is the right starting point.
Have a reroll plan. AFK winners happen constantly. Tell chat winners get 60 seconds to respond, then reroll without hesitation. One click, no dead air.