@Kedly What? This is flat out untrue. Back in 2008 Stardock’s attempt at a storefront via Impulse offered refunds: https://web.archive.org/web/20080708091849/http://tgnforums.stardock.com/315290
Later in 2013, EA of all companies would also offer refunds on their storefront, Origin: https://arstechnica.com/gaming/2013/08/ea-begins-offering-refunds-for-its-digital-game-sales-on-origin/
And later that same year, GOG would offer refunds: https://www.gamedeveloper.com/business/gog-s-new-money-back-guarantee-is-more-about-trust-than-refunds
It was only a couple years after EA & GOG, in 2015, that Valve began offering refunds on Steam: https://arstechnica.com/gaming/2015/06/valve-begins-offering-refunds-for-all-steam-games/
Your initial claim remains false.
As indicated, digital game storefronts offered refunds explicitly prior to Steam, and it wasn’t leading the way, especially given its policy was that all purchases were not refundable, up till 2015’s changes.
Leading the way isn’t making some exceptions to their policies occasionally, it’s making refunds a part of the policies from the outset when others aren’t.