Hi,
We're actually doing our research about ICOs and we feel unsure about hte following

What happens with not sold tokens in an ICO?
If the company is expecting to sell 100 tokens during the ICO but then only sells 70. What happens to the 30 they weren't able to sell? Do they remain just in the company (and/or the development Team)?
Are there any differences between different ICOtypes (uncapped, capped, etc) regarding this question?

thanks for your help,