Thank you for your questions.
Rental fee changes depending on who you will rent out your tokens to. Otherwise the rental fee will not change.
From 170 tokens you will receive from 62.55$ to 96.05$ annually depending on what rental fee you will choose.
Tokens themselves don't actualy mine for you, instead they will allow you to generate rental income.
Giga Watt mines all scalable cryptocurrencies: BTC, LTC, ETH/MONERO/ZCASH/DASH. The decision of what currency to mine is made by the customers who own the mining equipment. But at this stage it is technically impossible to offer all of these options to retail customers. We are working on the solution, and hope that in the future this option will be offered. At this point retail customers can mine only BTC, ETH, and LTC.
All the miners would be able to generate good income, even Bitcoin
You are buying WTT token. WTT token is an Ethereum token representing the right to use the Giga Watt's facility's capacity, rent-free for 50 years, to accommodate 1 Watt's worth of mining equipment power consumption. Essentially, this is access to professional mining – with an extraordinarily low entrance threshold. In fact, it could be compared to membership in an elite private mining club.
For every 100 tokens sold in this Token Launch 15 additional tokens will be issued and retained for the team, partners and advisors: 10 tokens to be distributed to team members, and 5 to be retained for distribution to partners and advisors at issuer’s discretion. Consequently, for every 100 tokens sold, 115 Watts of facility's capacity is put into operation. Giga Watt also makes money on maintenance and emergency repairs.