Roller Lifters With Concentric Grooves - Ok To Reuse ?

I wouldn't worry to much about oiling....as that area of the lifter isn't responsible for providing oil anyway. It looks to me like there might have been some dirt, or sort of debris in the engine floating around in the oil and it got hung up on either the cam lobe, or the roller.

Did you inspect the cam to see if it had the same marking?

As I said, if you're strapped, and know they were functioning properly, go ahead and reuse them. If you're really worried about the scratches, go ahead and give them a polish with some fine emery cloth to take the sharp edges off.

Running used rollers aren't necessarily "doing it wrong". I think out of the dozens of engines I've built/rebuilt, I've installed new lifters once....and even then that was because they came as a kit with the camshaft I was running. It's more of a comfort thing....like buying new head bolts every time you take the heads off. In my experience though, if it isn't bloke, or an area known for causing trouble, then don't sweat it.