With Banner Crate you receive Developers Rights.
This means if you design any new banner ads from these original templates for clients you can charge your clients for the new designs you've created and keep all the proceeds.
A few people have asked about Reseller / Whitelabel Rights for Banner Crate but we don't offer that, just the Developers License. So you can't resell the Banner Pack itself but you can use them for client/freelancer work and charge the client for the new design you've created.
If you need any further clarification of what you can and can't do please submit a support ticket.