Changing the tick rate affects that rate that drop spam throttling "decays" over time. If the tick rate is low, players cannot throw items as quickly.

To reproduce:

1. /tick rate 20
2. Quickly drop items from the creative inventory until the threshold is reached, causing you to drop only 1 item per second
3. /tick rate 1
4. Quickly drop items until the threshold is reached again
5. Try to drop more items, notice how it can take up to 20 seconds between drops

Code analysis:

LocalPlayer#tick() decrements dropSpamThrottler every tick, but MultiPlayerGameMode#handleCreativeModeItemDrop() increments dropSpamThrottler by 20 regardless of the tick rate.