You may cancel anytime. You'll simply lose access to updates to the bonus plugins/tools and if you're a Business Green member, your commercial license would expire at that point. You should keep it active as long you are selling/licensing your product to multiple end users. Work Products that you sold in the past do not suddenly fall out of compliance when your membership lapses – you just can't continue to sell products that use GreenSock tools after your membership expires. If you don't want to worry about the license expiring, you can simply get a permanent license. Oh, and we don't add any code into the members-only plugins that would make them suddenly stop working when your membership expires. They'll continue to work.