RazerStore Rewards is free to join and rewards you for shopping on the website. There are 3 tiers:
Tier 1 - Every £1 spent is worth 25 Razer Silver
Tier 2 - Every £1 spent is worth 50 Razer Silver, plus delivery is free on orders over £25. You get upgraded to tier 2 when you spend £500 at Razer
Tier 3 - Every £1 spent is worth 100 Razer Silver, plus delivery is free on all orders. You get upgraded to tier 3 when you spend £1,500 at Razer