Looks like they accept previously published stuff as well...as long as it was not in print, or in journals...so, here on this fine site known throughout the world as Stories Space should be alright...though you may want to check with them to make sure since they mention they do check for previous publication...which is the norm, btw...
Don't try to fool anyone...just a note...
I once knew a drinker who had a moderating problem...