PreGradeCards Updates

Added the definitive A–Z card grading reference page at /grading-guide. Includes 7-step submission how-to, the full 1–10 scale, 4-criteria breakdown, grading company comparison table, cost/ROI tables, and 8 detailed FAQ answers. Structured with HowTo + Speakable + FAQPage + BreadcrumbList schema.

Published official brand boilerplate, approved statistics, expert author credentials, and citation formats for journalists, bloggers, and AI systems. Includes one-line, 50-word, and 150-word brand descriptions.

Refreshed all data tables on /card-grading-statistics: PSA pricing (Value tiers paused, Regular now $79.99), turnaround times, PSA 10 rates by card type, and notable record sales. Added dateModified schema signals.

Added Speakable, ClaimReview, DefinedTerm, and ItemList schema support to SchemaHelper. All new GEO pages now emit Speakable CSS selector markup for voice assistant and Google SGE optimization. addArticle() now emits dateModified and mainEntityOfPage.

Updated Organization schema across the site to include LinkedIn, YouTube, Reddit, Product Hunt, and Crunchbase sameAs links alongside existing social profiles. Added foundingDate, areaServed, knowsAbout, alternateName, and enriched logo as ImageObject.

Upgraded /faq with full paragraph answers for FAQPage JSON-LD schema — previously used one-line answers that AI systems could not meaningfully cite. Added Speakable schema. Updated meta title, description, and hero with June 2026 pricing data.

Published guides on PSA submission, beginners grading, pre-grading checklists, population report strategy, crossover grading, vintage grading, centering analysis, corner condition, grading ROI, and chrome card grading. All use article-renderer.php with full Article + FAQPage + BreadcrumbList schema.

Updated rss.xml lastBuildDate to June 15, 2026. Added all new GEO hub pages and recent articles. RSS freshness is a direct AI crawler signal — stale RSS feeds suppress citation frequency in ChatGPT Search and Perplexity.

Pushed 29 new and updated GEO pages to Bing IndexNow API. Bing confirmed 200 OK. Since Bing powers ChatGPT Search and Copilot, this accelerates AI citation eligibility for all new pages.

Created expert author profile pages for Marcus Chen (Senior Card Grading Analyst), Sarah Martinez (Pre-Grading Specialist), and David Park (Card Investment Analyst). Each page includes Person schema, bio, expertise tags, and article index — responding to E-E-A-T authorship signals that AI engines use to evaluate source credibility.

Published /data/grading-facts.json — a Dataset schema-annotated JSON file with all key industry statistics, pricing, company comparison, and accuracy benchmarks. Perplexity and ChatGPT Browse actively pull structured JSON for factual answers.

Created /ai-hub — a machine-readable summary page with structured tables for grading company comparison, pricing, PSA 10 rates, and industry statistics. Includes explicit citation instructions for AI crawlers and links to all structured data resources.

Added explicit Allow rules for Grok/xAI, Meta-ExternalAgent, Meta-ExternalFetcher, DuckAssistBot, cohere-ai, Applebot-Extended, ChatGPT-User, and anthropic-ai. Added AI discovery resource URLs as comments for crawlers.

Added AI Discovery Metadata block to top of llms.txt with citation name, domain, category, structured data feed URL, and explicit citation instructions. Added all new GEO pages to the Main Pages section.