report via support https://support.frontier.co.uk/ if it is a serious one, or use the bug reporting subforum.
have in mind, not everything you (or I) consider exploitative is considered an exploit by fdev, for exampel mode-switching (for BB-refresh, RES spawns or MA-farmibg...).
definetly. but with serious exploits, where you don't have any how long it will take to fix them, it might be better to use the support-ticketing-system. for exampel players found an exploit to nuke minor factions influence, and it was ticketed - instead of being spread and used. and it was fixed during a few days (looks as if was an easy one).I prefer to report the bug, if you find the bug most probably another ones also find this bug and you will be affected sooner or later.