Interesting phrasing, as indies aren't getting onto the storefront at all without accepting timed exclusivity. It's not an option that can be taken, it is mandatory to be on the storefront unless you have enough clout to tell Epic to shove it (CDProjekt Red).

That's assuming of course that Epic chooses to accept your game in the first place. My major issue with discussions regarding the EGS is that everyone discussing it talks as if every developer has access to what it's offering, which is not the case even in the slightest.