our points increase slowly

He means that all points that were used for giveaways with unreceived gifts should be refunded.

Nah, i think just giving x2 points for each received giveaway. For example, if i give away a 10$ shit and a winner marks it as "received", i get 20p. Pretty fair.

I don't think the site runners here want to unbalance the current equilibrium by allowing people to exploit submissions with the current system. If they do take you up on the suggestion though, they would need to change the current system so that points are only awarded for public giveaways (i.e. non group, non private) AFTER they've been marked as successfully received. Both Group and Private giveaways can be exploited too easily to generate points otherwise, and I think they're probably already excluded from point generation.