In a video here, the author raised 52o to a limp from the SB/BTN HU at the final table. The SB was limping most hands. I assume the idea is that you don't want to r/f a hand with value when you can see a flop for free. However, it isn't a good spot playing that sort of hand OOP in a raised pot. Later he raised J7o in that situation. It seems to me that it would be better to raise some average hand like that, or maybe like 54s or 75s in that you would have a lot more playability if flat called. I know people have been doing that, raising absolute junk for at least 10 years.