ShackNews spotted the EULA for Spore has appeared on the Steam website. The site speculates EA will soon offer Spore and perhaps other games as well on Valve's digital distribution platform.
EA has long refused to offer titles on the Valve-maintained digital distribution platform, and has instead opted to pursue digital distribution through its own online store.
Though the EA-published Crysis and Crysis Warhead debuted on Steam earlier this year, the availability of the two games was negotiated by developer Crytek and Valve. Both were originally released under EA Partners label, much like Valve's own The Orange Box and Left 4 Dead.