It's complicated:
a. GridRoad will be taking advantage of Steam specific features such as steam leaderboards, so I can't continue with a non-steam version, which is why I have provided keys to everyone who purchased it.
b. Steam has a policy where I cannot undersell the game on any other storefront
c. Steam's prices are inclusive of any sales tax (if it says 4.99 you're going to pay 4.99)
d. Itch's prices are exclusive of sales tax (if it says 4.99 then you pay 4.99 PLUS any sales taxes from your country)
What this means is that the only way for me to have GridRoad Steam keys available for sale on itch is to overcharge them, deliberately charging a higher price so I don't violate Steams terms by undercutting their price. I don't want to overcharge anyone so I removed the game from sale. I think the only way to do this is to remove the builds from itch (they're still there but hidden).