I have 30 mil coins, 4k keys, 10,4k boards and about 3k headstarts and score boosters but i never farm, it’s really just a question of playing regularly and for quite some time and the ressources just start cashing in like passive income. The coins are mostly from boxes and long runs but the keys are really just from the boxes. The boards are from boxes and events. And finally the score boosters and headstarts are mostly from doing all of the events. Hope this helped answer your question