Your rewards.
When a coin’s creator chose holder rewards, the family royalty its branches pay buys that coin and is shared among its holders, pro rata to what each wallet holds at the moment it is shared. Your share waits here until you claim it; the platform wallet sends it, so claiming costs you nothing.
Sign in to see your rewards
Signing in signs a short message to prove the wallet is yours. It is not a transaction: it costs nothing and sends nothing.