Yeah not sure about players rejecting them but there definitely could be intersample distortion with 0.1dBfs masters if not done carefully. Maybe they're doing that as they're dealing with a lot of home made masters?
I'm very tempted just to cut a couple of tracks to try it out. £27 for a dubplate is very reasonable!
If one uses oversampling in the gain reduction path of the limiter (there is often a button to enable that), you don't get intersample clipping. But, and here's the catch, it's often not used in pop/rock/electronic because it often makes the limiter to work more (ie sound worse). Also clipping is used in mixing and mastering to a surprising degree these days. You get rid of those pesky short peaks and trade them for some often inaudible short distortion.
27gbp dub plate sounds like good, one could use it to "vinylize" some samples/loops etc.
