Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
I believe they are replying to the article you posted in regards to the download from legit sites comment, not the fact that the sites have shit web practices (which while correct is a different thing).
To the people who didn't read the article posted in the comment prior, basically the software installed wasn't the legitimate software, it was a modified software that was a trojan that was forwarding passwords stored in the keepass database to a home server.
That's not something that the sites are going wrong, nor is it the password managers fault. That's fully the users fault for downloading a trojan.