High conversion email campaign designs

We are a B2B marketplace based in Turkey, focused on the jewelry industry. Our platform enables jewelers to compare diamond prices from various suppliers, providing them with an efficient way to find competitive prices. Instead of a commission-based model, we operate on a subscription-based structure, with a goal of selling subscriptions directly to jewelers. The target is to secure 5 to 10 new subscriptions each week. We aim to run campaigns costing around $20 to $30 each, with an initial timeframe of one week. For every new subscription, sales agents will receive a one-time bonus as an incentive, applied only to the first sign-up and not for recurring renewals.