Unique "invite"/"access" code question

Hello. 🙂

I will buy the PRO Version if I can get the plugin to do the following (or something very close to it!):

1. I’d like to start my website in Private Beta. As such, I will limit the purchases only to people that have a valid “invite”/”access” code. (We only have 1 product at 1 price, and will probably stay that way for a good while. The product is to be purchased once per month, but we’re not doing a subscription or auto-ship.)

2. We will be using WooCommerce as the shopping cart, with Braintree by Paypal as our payment gateway.

3. I’d like to create/upload hundreds/thousands of unique codes (I have the software that can create these random codes,) and I would like these codes to be able to be used only once. (Yes, even if a customer has ordered before, we will e-mail them a unique code every month so they can purchase again.)

4. The FIRST time a customer orders, we’d like to email them 4 codes that they can share with friends/family/others. (If possible, we’d like these codes to be time sensitive eg. “codes are only valid for 5 days,” or, “codes expire at midnight 28 October 2016.”)

5. The new customers that sign-up would also get an email with 4 codes that they can share, and the process continues.

6. (We’d be OK if we have to manually do a lot of this.)

7. We picture that the invite/access code can be put in the shopping cart’s promo code box. The code must be valid in order for the order to be able to be submitted.

Thank you for reading this far.(!) We see the success of Google’s invite campaigns, and we’re looking to do something similar. I’m looking forward to your reply, as well as any suggestions/work-arounds/hacks we can utilize to get us where we want to be.

Thanks again!

https://wordpress.org/plugins/pricing-deals-for-woocommerce/