1 satoshi i common on most of the gambling sites and gambling at 1 satoshi won't make any big difference even if you win because minimum withdrawal on most sites is 0.001 which is standard throughout gambling. If you want to gamble below 1 satoshi buy doge they allow people to gamble with 1 doge which is 0.001 satoshi or something around this
that's right if you would like to bet lower than 1 sat then buy doge as its also been use for some gambling site they will allow you to bet using
this coin and you will be able to bet much smaller stake then convert it to btc again if ever you win and enjoy.