"5. What features, uses or attributes do EOS Tokens have? Can the EOS Tokens be used on a blockchain adopting the EOS.IO Software?
The EOS Tokens do not have any rights, uses, purpose, attributes, functionalities or features, express or implied, including, without limitation, any uses, purpose, attributes, functionalities or features on the EOS."
*https://www.eos.io/faq.html
So are EOS tokens just a way of raising money for block.one? Short answer: No.
I watched this video by the Awakenment.
Here's my synopsis:-
He makes the following analogy: Bitcoin is blockchain gold. Ethereum is blockchain gas, Ether powers the contract. EOS is blockchain real estate.
What people are buying is floor space in an "office block". The office block is for decentralized developers (dapps such as everpedia). As an investor you are buying tokens which can either be rented or sold to developers. Other buyers of tokens will be dapp developers who will also buy early on. Dan Larimer is going to be developing dapps on EOS.
"I want to eat my own dog food." - Dan Larimer blockchain programmer.
The more successful the token the more floor space on EOS you will need and thus the more tokens.
According to the above vid you can also rent to developers similar to how you can delegate your steem power.
The price of the token will go up the more EOS is used.