I recently had a look at the way some other servers handle this and honestly we should have more things in the shop, coin exclusive items or whatnot that are cosmetic or whatever, give people more incentive to try and gain coins to get said items for customization.
The more the merrier, and the fancier the better, players should be able to customize their character and personalize things to make them stand out a bit more, creating iconic looks that others can recognize and such. Maybe more Ghost forms/looks could be added too for coin unlock, or even species customization like mutant colors, IPC screens/Chassis Styles, Cyborg module looks, Hair styles, Lizard horns and tails, Diona eyes/leaves/flowers, and more! Hell even custom toys or fancier zippos would help.
Then adjust the way people gain coins, the passive gain from living in a round could be adjusted but, things like unlocking achievements, partaking in events, Helping other players, finding secrets, completing antag objectives, completing crew objectives, helping finish a station goal, and more could be ways to gain extra coins each round.
This would help with players interacting with each other, increase the customization and personalization of a players character, and if implemented properly help rounds flow a bit smoother with more things getting done rather than a players OOC goals for that round, driving IC roleplay and interactions.
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But the main issue is…
WYCI
and WYSI
Coding and spriting these things can take a lot of time and effort, and finding one person who’s willing to do so can be hard, let alone a group of people which would be more ideal.