Currently, most beatmaps being played are the common ones. Having a "weekly mission" feature that features rarely-played (< 100k play count) songs would be a good idea. The songs featured will be rotated weekly. There could be different types of missions, and points are awarded for each mission completed successfully.<br>
For example: play XXXX featured song in osu!mania to gain X mission points. After accumulating X amount of mission points, it can be exchanged for some sort of prize (trophy, osu supporter, trial card for osu direct, unlock certain aspects of profile theme feature such as skinnable graph, etc). All these items could be stored in an inventory, and possibility be used to trade with other users.
The weekly featured songs could have some sort of theme. For example: Thai songs, Cantonese songs, sad songs, nightcore, graveyard beatmaps, pending beatmaps, etc. This will help to promote rarely-played beatmaps, and also encourage potential beatmappers to create beatmaps of other languages or playstyle.
For example: play XXXX featured song in osu!mania to gain X mission points. After accumulating X amount of mission points, it can be exchanged for some sort of prize (trophy, osu supporter, trial card for osu direct, unlock certain aspects of profile theme feature such as skinnable graph, etc). All these items could be stored in an inventory, and possibility be used to trade with other users.
The weekly featured songs could have some sort of theme. For example: Thai songs, Cantonese songs, sad songs, nightcore, graveyard beatmaps, pending beatmaps, etc. This will help to promote rarely-played beatmaps, and also encourage potential beatmappers to create beatmaps of other languages or playstyle.