oh i can't cos my other account is restricted to 150 listing a month and ive near on used them up for this month. that would be why i didn't receive that offer through email on that account     One of my accounts is limited to 100 per month but last month I had already listed the 40 free before I got an email offering me 100 free. I managed to list the full 140 ... maybe the email offer overrides the limit ...

It's usually the total number you have listed, less any sales. So if you list 100 this weekend, once they go into unsold, your allowance goes back up