The term "Premium Snapchat" can refer to a couple of different things: the official paid subscription service called Snapchat+ (or Plus), or a creator's private, paid content account (often monetized through external platforms).

Since you are asking about monetization and promotion for 2023, here is a guide covering both the official monetization for creators and strategies for a private, paid content account.

1. Official Creator Monetization (Snapchat+)
Snapchat's primary official avenue for creators to earn revenue is the Snapchat Creator Monetization Program, often associated with becoming a Snap Star (a verified creator with a public profile). The Snapchat+ subscription service, while offering premium features to users, is a different product.

Setup and Eligibility for Creator Monetization:
This typically requires meeting high engagement and follower metrics to be invited to the program:

Create a Public Profile: This is essential to gain subscribers and use creator tools.

Audience & Engagement:

Have at least 50,000 followers.

Achieve high engagement in the last 28 days (e.g., 10 million Snap views or 1 million Spotlight views, or 12,000 hours of view time).

Consistency: Post content frequently (e.g., at least 25 times per month to Saved Stories or Spotlight, and post on at least 10 of the last 28 days).

Compliance: Be at least 18 years old, and publish original, advertiser-friendly content that complies with Snapchat's guidelines.

Invitation: Snap Inc. reviews creators and sends an invitation via email once they are eligible.

Monetization Through Snapchat's Program:
Ad Revenue Sharing: Creators in the program earn a share of the ad revenue generated from ads placed in their Public Stories and Spotlight content. Earnings are often tracked through "Snap Crystals."

Spotlight Rewards: Snapchat has historically offered rewards pools for top-performing Spotlight videos.

2. Private Premium Content Accounts (External Monetization)
For many, "Premium Snapchat" refers to an account where content creators offer exclusive, paid content (often mature, niche, or personal) that is not monetized directly through Snapchat, but through an external subscription or payment platform.

Setup:
Create a Dedicated Snapchat Account: Keep your premium content separate from your personal or main public account.

Choose an External Monetization Platform: Snapchat doesn't have a native system for charging followers directly for individual accounts (unlike platforms like OnlyFans, Patreon, Fansly, etc.). You must choose a platform that handles subscriptions, payments, and private messaging, and then link to it from your Snapchat profile.

Establish Pricing Tiers: Determine a monthly subscription price and potentially different tiers for various levels of access or content.

Monetization Tips:
Exclusive Content: The content must be truly exclusive and worth the subscription price. Behind-the-scenes content, personalized Snaps, private messaging access, and longer-form videos are common offers.

Personalization: Offering personalized content, such as custom snaps or video shout-outs for an extra fee, can significantly boost income.

Tiered Access: Use your external platform to offer different levels of access—for example, a basic subscription for general premium content, and a higher tier for private chat or personalized requests.

Promotion Tips:
Since your core content is behind a paywall, your promotion strategy focuses on using free platforms to drive traffic to your paid link.

Leverage Public Social Media: Use platforms like TikTok, Instagram (Reels/Stories), Twitter, and even your public Snapchat profile/Spotlight to promote your content without violating their specific content policies.

The "Tease" Strategy: Post content that is engaging, authentic, and high-quality, but always includes a clear Call-to-Action (CTA) pointing to your premium link in your bio.

"Free" Snapchat as a Funnel: Use your public Snapchat Stories and Snaps to give followers a taste of your personality and content style, and then direct them to your premium link for the "full experience."

Cross-Promotion: When you post on the premium platform, use the content to create a censored/tease version for your free social channels.

Link in Bio Tools: Use a "link in bio" tool (like Linktree or similar) to manage all your social links and prominently feature your premium link.

Disclaimer: It is crucial to adhere to the Terms of Service and Community Guidelines of Snapchat and any external platform you use for monetization. Content, especially mature content, must comply with all relevant laws and platform policies, which are subject to change.