Hi, I have 3 questions about this really exiting looking IOTA:

1. How is it possible that a transaction in IOTA will cost nothing?
2. Has IOTA plans to work together with other cryptocurrencies besides Ethereum in the future?
3. What is the maximum number of TPS IOTA can handle? I read that a month or two ago it sucessfully did 137 TPS.

I appreciate any info