Bonus' marketing headline "Sell once. Profit twice." stands out and works well for these reasons:

• Uses two short and punchy sentences that creates a parallel structure that is easy to rememember

• Clearly communicates a compelling value proposition → doubled revenue from the same sale

• "Profit twice" should immediately appeal to anyone who values money

• Creates intrigue. How exactly can I "profit twice"?

• Avoids technical or industry jargon while still clearly speaking to potential customers