The Mini is designed for wifi sharing. However, it does generate income from being connected to the internet and mining. The Mini generates ~175 ke/s in processing power. Depending on upload bandwidth and network difficulty this will generate ~15-30 PKT per day, paid every minute.
Mining yields will vary based on mining competition. The more miners, the fewer rewards are shared amongst all miners. Every 100 days there is also a decimation that occurs on the PKT blockchain, which reduces mining rewards by 10%. The best time to accumulate PKT is now.