I was tolled that there is this custom called Black Friday apparently with discounts and alike, so lets participate... with the code bfriday22 you can get 15% discount on supporter certificates for Sandboxie-Plus https://xanasoft.com/product-category/sandboxie/ valid until the 28.11.2022
there is currently no mechanism to stack certificates will have to look into that, but you can email me after you got the new one I'll send you one with a issuance date 20 days in future. For the future I'll set up the cert check such that a cert works for up to 1 month after expiration so its easy to overlap certificates having redundant time spans.
Sent email with the details of new and old certificates. Many thanks for the discount. Rather than Black Friday, or perhaps in addition, may I suggest that you could offer a loyalty discount on renewal. Henry
reply with cert sent... yea I should look into implementing some renewal discounts, will make the store even more complicated LOL