I am from Europe so ROAR means nothing to me.
EFRA rules state "It is advisable to restrict charge rates to 1C."
It is my understanding that advisable is different to mandatory.
Lack of knowledge concerning LiPo can be blamed in the late adoption of this technology in this hobby.
I find it amusing when some (not all) people with years in this hobby do not have a clue how to properly take care of a lipo pack and then whine when their pack has puffed after only a few cycles when they took so good care of it (storing it fully charged, fully discharging it every once in a while etc
Still when you try to tell them this does not apply to lipo packs they do not listen.
Some of these people are part of federations.
I mean just check the tests ROAR performs for battery approval.
1. Impact/Drop test
2. Overcharge test
3. External short test
I understand that they are concerned only about the safety of the pack and not its performance.
Still this makes it easy to understand why a manufacturer can claim 150C and 10000mAh from a 300gr pack and say it has ROAR approval.
Most people will think that since it is approved it must be true. Great marketing.