RE: Save Splinterlands GiveAway#31! Plus Burn Event! Up to 15 Winners!

Burn event:

Grund
Obsidian
Venari Spellsmith
Supply Runner

I sent 3 BCX

Btw is it ok to send any amount of BCX as long as it is higher or equal to the minimum? So could I send 4 BCX for this event or should it be 3/6/9/... BCX?