To get more Giveaway points you have to create Giveaways.
Every user that creates a giveaway, when the giveaway is closed, will receive the amount of points equals to giveaway value
PLUS 5% ( FIVE PERCENT ) of Giveaway entry point for every user that entered his giveaway.
So, if you organize a giveaway that requires 2000 GWP to enter and you totalize 500 entries,
you will receive 2000 GWP points PLUS ( 2000 * 0.05 * 500 ) 50000 bonus points = 52000 GWP
when the giveaway will end ( after you send gift to the winner and he confirms he received it ).

However, every time your GWP credit will drop under 2500 GWP for more than 48 hours, it will be automatically restored to 2500 GWP by the system.
The 48 hours are calculated by the system starting from the last operation on your Giveaway Points,
e.g. you enter a Giveaway spending points, you leave a Giveaway.

When Galapoint conversion will be active, another way to get GWP will be buying indiegala bundles.
Since for every galapoint you have on your indiegala profile, you can convert it into GWP.