You'll have the chance to buy 1 for every 4 shares you have (as of what date, they haven't stated I think?)
Once you get your 100,000 options for $10 for example you'll then have to pay another 4c per option to get the shares so an additional $4,000.
This $4,000 goes to the company and they can use that cash to generate more revenue (nice eh?)
In total to get your 100,000 shares you'll have paid $4,010 + whatever extra fees you might incur.
The point of this is, you can spend $10 to have the Option to buy these shares @ 4c up until 30th March 2019.
By this stage the SP could be 10c, 20c, whatever. But hopefully substantially higher than 4.01c.
It's at this point you'd make the decision to convert/exercise the options that you've paid virtually nothing to hold to make instant profit.
TL;DR Buy these options for nothing, hold, wait till SP gets fat. Convert, shower in free monies.
Please correct me if I've made an error! GLTA looks like a good day to me.