Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
linden lab may offer you the opportunity ( directly or through an applicable payment service provider ) to purchase or use virtual credits , points , tokens , services , or items ( `` virtual goods and services '' ) . 

```
. OPTIONS: ["Unilateral termination", "Contract by using", "Content removal", "Choice of law", "Jurisdiction", "Arbitration", "None", "Limitation of liability", "Unilateral change"].