Epic Games have promises they will provide full refunds to anyone who has crowdfunded a game that will now become an Epic Store exclusive.
Shenmue 3 is one notable example, which was originally due to release on Steam, but now will be an exclusive for it's first year to the Epic Games Store. Backers were very upset at the news, and were further outraged when refunds were not forthcoming, with the company and Ys Net saying they would simply "assess the situation".
That's now changed, though, as CEO Tim Sweeney has promised that this sort of situation won't be repeated, and that anyone wanting a refund will be given one.
When future games go Epic-exclusive after offering crowdfunding rewards on other PC stores, we’ll either coordinate with colleagues at the other stores to ensure key availability in advance, or guarantee refunds at announcement time.— Tim Sweeney (@TimSweeneyEpic) July 2, 2019
Epic is covering the costs of the Shenmue 3 refunds, so the development won't be negatively impacted by huge numbers requesting one - which is a win-win.
It does however not change the exclusive situation - gamers looking forward to picking the game up are basically forced into either waiting a year, switching to the PS4 version or having to use the Epic Games Store.