The main point of holding ANS is that you - yes, do collect ANC, which will rise in value as the platform gets used more and more, but also to collect transaction fees through ANC AND fiat (and have voting rights so you could change the fee to whatever in the future). Well...that bookeepers collect fees, however ANS holders determine who they are (vote them in), so in theory they could offer to pay ANS holders part of their transaction fees in order to be voted in. Also ANS holders directly collect a portion of transaction fees "extra service charges".

Straight from the whitepaper:

"There are two built-in assets on Antshares: the Antshares and the AntCoins. The Antshares represent ownership of the Antshares Blockchain and are used for elections, bookkeeping and generating AntCoins as dividends. While on the other hand, the AntCoins are about the right of using the Antshares Blockchain and are used to pay systemic fees.

Systemic Fees

Systemic Fees are required in the form of AntCoins as payment for writing data into Antshares Blockchain. They can be categorized into:

a) Accounting Charge Collected by Bookkeepers

To write a transaction onchain, a certain number of AntCoins will be charged as accounting fees, which goes to the bookkeepers to compensate their expenditures in storage, connection and computing resources.

The rate of accounting charge or whether to charge it at all is collectively determined by all bookkeepers. As long as more than 2/3 of the bookkeepers are willing to, a transaction can be free of charge when writing into the Antshares Blockchain. Thus, organizations using Antshares in bulk could pay the bookkeeper offchain with fiat currency without further the hassle of paying AntCoins onchain. <--obviously ANS holders would demand some kind of

b) Extra Service Charge Collected by Antshares Holders

Extra Service Charge is the fee paid by AntCoins for advanced functionalities of the Antshares Blockchain. For the time being, extra service charge is required for Asset Creation and Registration for Bookkeeper Nominees. In the future, Altering, Writing-off and Freezing of Assets may require extra service charge.

Extra service charge will be written into the corresponding addresses of the Antshares proportionally in real-time. Antshares holders may claim the AntCoins registered in their names anytime they wish to."

ANS holders can vote to change anything on the blockchain including fee structure, they own the blockchain. ...the extra service charge has no limit in theory and could include anything.

Edit: guys, as posted above, the whitepaper specifically says: "The Antshares represent ownership of the Antshares Blockchain and are used for elections, bookkeeping and generating AntCoins as dividends." So perhaps they are used directly for bookkeeping as well.