This is bad news for us, because it might also signify that regulators would now start going after altcoin exchanges. Some of them, especially the smaller ones, might decide to close to avoid paying any penalties I reckon.
Not to do with listing fees specifically, but I suspect altcoin exchanges have been on regulators' radar for a while already. The SEC seemed quick and happy to whitelist Poloniex's acquisition because the deal included much stricter compliance standards and licensing, etc. I believe we're moving into an era of whitelisted exchanges -- in contrast with exchanges that are prone to regulatory enforcement. The recent warning Binance received from the Japanese FSA is the mildest we should expect. The other extreme would include actions like the BTC-e shutdown last year.
Bisq exists, decentralised cryptocurrency exchange running for ~ 2 years.
But there isn't any kind of equal access way to list new cryptocurrencies there. Bisq's developers control which new coins can be traded, as code needs to be added to the software to accommodate new coins.
Maybe it would be a good idea if that development model was changed; some kind of basic interface could be coded for the developers of new coins to add their new token themselves (instead of this ICO model that attracts so much attention, where it should really be derided). I guess the Bisq developers would have to agree, although I can understand the quality control argument behind their current approach (although there's no reason why discretion couldn't simply be exercised on the basis of each individual pull request for a new coin, this would free up more of the developers time for other stuff).
That's the fundamental problem with most decentralized platforms right now. Listing is a matter of centralized development and market launch. The exception is ERC20 token exchanges like Radar Relay and Etherdelta, where you can trade any ERC20 token without official action. This works with standardized interoperable protocols (like ETH/ERC20/ERC721), but naturally doesn't extend to just any altcoin.