1. I received useful emails each day, and spams are always around 10%. Maybe I am just conservative about wher I put my email? Not being in crypto may help as well, but it's definitely not 1%-99% for me, more like 90%-10%.
2. More importantly, an email provider that doesn't make an effort to distinguish between 99% of spam emails and 1% of legit ones is definitely useless and worthless.
Uniswap the protocol is like SMTP - it's open and permissionless. Uniswap the website is more like Gmail, it has a whitelisted set of tokens to swap.
Because it's a protocol anyone can build a frontend on top of it to filter out any information they like, just like Email. Zapper, DeFi Saver and Zerion are examples of this. Element Finance runs using Balancer under the hood but you wouldn't know and aren't exposed to any tokens or pools they don't manage.
2. More importantly, an email provider that doesn't make an effort to distinguish between 99% of spam emails and 1% of legit ones is definitely useless and worthless.