Tracfone has started a rewards/referral program. It looks like it will be pretty generous, as are similar programs from other Tracfone Group pvoviders.
It appears that you'll be able to use points to 'purchase' standard refill plans and add-ons, with 1000 points translating to $10. (Don't hold this against me if there is a limited selection, or valuation changes, etc-- it's new, not completely documented, and you can't redeem points until November.)
Although you can earn rewards points just for joining (200 points), and for watching a video, doing a short survey (10-50 points), for adding a monthly plan, etc., the big boost is from using a referral link when signing up.
Here's the important part for current Tracfone users: whether by design or by mistake, the rewards program currently treats existing users just like a new user for rewards purposes. That might change later, so it's probably a good idea to join now if you already have a Tracfone line.
The referral bonus is 5000 points (or up to 8000, if the code supplier has enough successful referrals) for both the code referrer and new user. If the current information holds true, that's enough to pay for 1-4 months of service (depending on the plan), or to add a bunch of data or extra minutes/texts to your line.
The signup process:
Make sure you're not logged in to a current Tracfone online account. (That might cause problems signing up.)
Visit https://www.tracfone.com/rewards , and enter your phone number, IMEI, or SIM ICCID.
After joining, you'll be prompted to log in to the dashboard. (Using your standard online account username and password-- if you don't already have one, you'll need to create one, but it can be a throwaway email and whatever name you always wish you had. Since I already had an online account, I'm not sure of the process if you prefer not to have an online account.)
When logging into the dashboard, you'll see a field to enter a referral code near the bottom.
My referral points showed up immediately.
You can also earn points (7000) for adding a line to your existing account. (Must stay active for 60 days.)
Some general info: https://rewards.tracfone.com/friend
For those inclined, I'm posting my referral code in the Referrals thread.