How to get shards in alien worlds?

Could you elaborate on the process of acquiring shards in Alien Worlds? I'm curious to understand the various methods available for earning these tokens within the game's ecosystem. Is mining a primary means of acquisition? Are there other activities, such as completing quests or participating in events, that also yield shards? Additionally, how do the shard rewards scale with player performance or investment? Understanding these details would help me make informed decisions regarding my strategy in Alien Worlds.