an other idea could be to give X amount (fixed or %) of BTX to all wallet that have a minimum of X BTX (i.e. 30 btx) but with the particular condition of no transactions in last X days (i.e. 10/15).
in this way you will cut out the shitty splitters that made transaction only for the giveaway in the last minutes/hours and you will encourage users to store them.
in this way you will also cut out the address of mining and address of cryptopia.
https://chainz.cryptoid.info/btx/wallet.dws?149.htm (this is some of cryptopia addresses, you think it's really fair?)
and people will collect their BTX from exchanger or miner account every X days



please no.
so all people with 5000 btx will split in 100 address of 50 each and will get 1000 btx cheating.