1) Im not entirely sure but I would assume there would be less 'heat' on an older account (maybe username login) compared to a fresh account. Either way I would think they detect mainly by player movement/hours online and amount of times being reported.
2) Yes, ban on RS3 carries over to OSRS and vice versa.
love your DP, rewatching that series rn
Btw, can you give a brief overview of recommended stats to run this without failing so many (also what quests)
can anyone chime in how much they make on average/hour