Tesla has axed its long-standing referral program for its vehicles and now only offers a referral program for its solar roof.

The electric car manufacturer has used its referral program to encourage owners to promote the brand and for each time their unique referral code is used, they receive a reward. Most commonly, Tesla offers free Supercharging and at one stage, Tesla was giving away free Roadsters to owners that made enough referrals. As Electrek notes, as many as 80 Tesla owners are set to receive free Roadsters.

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Most recently, Tesla was offering 1,000 free Supercharging miles for those that used a referral code to purchase a new model but as of September 18, 2021, there are no rewards on offer. The solar roof is now the only eligible Tesla product that the referral program still works for.

“At this time, orders for Solar Roof are eligible for the Referral Program,” Tesla confirmed in a statement. “To earn Referral awards, Solar Roof orders must be placed through your unique referral link. Note that referrals cannot be added after an order is placed, and awards are granted after the Solar Roof system receives permission to operate on the grid from your utility.”

Interestingly, Electrek states that this probably won’t by the end of the referral program. Some sources claim it will eliminate referral links and instead opt for an app-based referral program that promotes in-person referrals. It is unclear how existing owners will be rewarded but free Supercharging miles may no longer be on the table as in the first few months of 2021 alone, Tesla reportedly spent $23 million on free Supercharging offers.