could you make something so that you can swap from osrs to rs3 or vice versa which is legal instead of banning people or giving them a warning and I know it is possible I have played games where it worked and that is very well received by the players of another game
It is not against the rules to swap currencies between the RS3 and OSRS games. Players do not get banned just for swapping.
However, swapping is a trust trade and comes with a very high risk of getting scammed, as not all the swappers will uphold their end of the trade. There is also the risk that those offering to swap are involved in Real World Trading, and if you swap with them, you are opening your own account up to a possible RWT ban.
This Forum is for feedback and discussion of updates for RS3 that are already on the drawing board, rather than for suggestions.