If you are looking for other sites that delegate hive power and small amounts of hive.
Check out the giftgiver.site If they have any available they give out delegations for ~ 7 days.
They also have the faucet that will give you,
claim your free 0.003 HIVE and 0.002 Hive Power, each hour.
https://giftgiver.site/faucet
It seems that Splinterlands pulls back it's delegation of hive power 60 days after the account is opened.
RE: Splinterlands Grinding Experiment - Making Use of Hive's Social Aspect