EGS doesn't sell Steam keys but games still can't be listed for cheaper on EGS than Steam without violating Steam's terms, for example.
But are devs allowed to sell for cheaper on Epic? I haven't see any evidence that they aren't. On the othet hand, I can point to multiple examples where games are cheaper, on other services like the examples I gave, which seems to disprove this.
Thats why I was asking for evidence. Because so far, there is quite a bit of evidence that devs are allowed to chose their prices on other distribution channels, and to my knowledge, no real evidence made available that it is written in contract otherwise.
Ill double check the available documents, and edit this comment, but at least when I last checked like six months ago, they only had one example, and it was Steam warning a developer for giving away free copies (if I remember right, Steam keys) on their Discord. I never saw any other solid evidence.