I believe no but all traders like it if they are paying less fee most especially if your a poor trader. Have not visit cowswap yet but if its look like etherdelta, that's great as I already use this exchange before.
Its like you are paying the tokens you earned. Bounty tokens are good for this however knowing cowswap new platform, which is made for traders and not for any token that havent any use case at all. For sure only tokens with good liquidity will be used here or listed.
Ive never checked it yet too but it seems they got a hype since most CT Ive saw are following it and even posting about it.