If make the pre-sale period longer would boost the interest as sometimes when presale periods are long, interest slowly drops as lot of people can not afford to invest sums needed during presale.Good partnerships keep people interested and focused on idea.
Since Agate set minium investment at only 60 USD,everyone should be able to join the sale!
I think thats good decision,as this will allow many people to join,and afterall,you need community in order to succeed.If you set minimum atfew ETH,number of people that can join is significantly smaller,so better let everyone to join!