Why did the Rambus decide to sell its own IC chips?

Rambus owns thousands of IPs in the areas such as memory controllers and serial links, package layout, system design, and lighting and display technologies. Rambus is the exclusive licensee for the Dally family of patents which are owned by Massachusetts Institute of Technology. This license was assigned to Rambus as a part of its 2003 acquisition of technology and IP from Velio Communications, a company founded by Dr. William Dally. In 2009 Rambus has purchased memory-device packaging patents from a company called Inapac Technology, Inc. In the same year of 2009, Rambus had also acquired the advanced lighting and optoelectronics patents from Global Lighting Technologies (GLT), which include MicroLens light distribution technology, and suitable for computing and consumer electronic applications. Recently Rambus had also acquired Cryptography Research, a company which has developed security technologies such as differential power analysis (DPA) countermeasures. Cryptography Research also developed anti-piracy and anti-counterfeiting solutions including CryptoFirewall technology. The CryptoFirewall core is a separate, on-silicon, hardware-based security block that protects cryptographic keys and computations from attack. Added to all these above, Rambus joined Industrial Technology Research Institute (ITRI) in Taiwan to develop interconnect and 3D semiconductor packag...