rodan28

[crimson inlet]

You can apply a coupon to give free month free for your customer

[wooden spoke]

I may wrote it wrong, I don't give user free month,
I use usage billing, I sent usage to stripe every time.
I want to give user free 100 items, and I want to bill after this limit. So for example, if you buy 234 items, you pay for 134, but only in first month. In second month you will pay for what you buy, for all items

[crimson inlet]

OK, then you can listen to invoice.created event and create invoice item with negative amount to offset the 100 items that you want to give for free.

[wooden spoke]

at the end billing cycle?

[crimson inlet]

Yes, when the upcoming invoice is created