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

1. You have to confirm 2 to send. So you act as the user AND the "miner" at the same time.
2. Yes, they do want to build interoperability with Ethereum in future. Actually they're already working with Rootstock. I don't remember where I read the Ethereum one but you can verify Rootstock from their official tweet:https://twitter.com/RSKsmart/status/872450726131359744
3. There is no max, its a scalable system, the more the transaction and nodes the faster it gets. With almost 250 nodes they hit around 180 CTPS (confirmed transactions per second).