A: Thanks for your questions... I'll answer below in CAPS so it's easy to see them.

1. I noticed you´re kindly adding double members, storage and bandwith to sumoling reviews. Will i get the same upgrade with x1 code?
-- YES, ANY TIER YOU GET ON APPSUMO, WE'LL 2X THE LIMITS OF THAT TIER

2. Just double check. With x1 code I also get SSL certificate for life, correct?
-- YES, THAT'S CORRECT.

3. Regarding selling Digital Products. Is this done via a shop i can build in the front-end of the website for all visitors to see, or is this something i can do just to make available to members of the site via the back-end or a private member area?
-- THIS IS A COOL FEATURE. YOU CAN CREATE A BUY PAGE FOR A DIGITAL PRODUCT OR SERVICE... OR WHATEVER YOU WANT TO SELL. HERE'S A VIDEO ON THAT: https://www.brilliantdirectories.com/sell-digital-downloads-add-on

4. What are the payment gateways that I can add to my store to get paid for digital product sales?
-- IT WOULD BE THE SAME PAYMENT GATEWAY YOU CONNECT TO YOUR SITE TO COLLECT MEMBERSHIP FEES. SO YOU ONLY NEED TO CONNECT A GATEWAY TO YOUR WEBSITE ONE TIME... AND IT WILL WORK FOR ANY PURCHASES DONE ON YOUR SITE. HERE ARE THE GATEWAYS WE SUPPORT: https://www.brilliantdirectories.com/payment-gateways

Thanks again for your questions!