In the last month there has been an increase of the tokens held by the Hive Engine account @honey-swap. More than one millions tokens were deposited and powered up by the account. My wild guess is that these are some of the funds sent to other exhcnages when the funding rate for HIVE was high there, and now they are coming back.
I know Splinterlands is debating about how to handle their large amount of HBD and if they should convert to Hive or not.