OnlyFans announced Friday that it reached a deal to sell a roughly 16% stake to Architect Capital that values the porn streaming site at $3.15 billion, after the Silicon Valley investment firm struggled to clinch backers . Fenix International Limited, which owns OnlyFans, said the deal includes a $535 million investment that will help the revolutionary nudie site offer new financial services for its creators, “who are often underserved by traditional financial institutions and products.”