Does CheapStack support Polar.sh payment processing?

CheapStack was built with Polar.sh as the primary payment processor. The SaaS Starter ($49) includes Polar.sh checkout integration for one-time purchases and subscriptions. The SaaS Boilerplate ($59) supports Polar.sh alongside Stripe for dual payment processing.

// Polar.sh checkout link — add to any product page
<a href="${polarCheckoutUrl}" className="btn btn-primary">
  Buy now — ${price}
</a>

Which CheapStack product includes Polar.sh payments?