Just look at Bitwarden. It started out as a free and truly secure answer to password managers that were cross-platform and web/browser-based, but had issues with trust and privacy. A lone developer put his money where his mouth was, and built the product up into a SaaS that is now a small but profitable company. It’s now the fastest growing password manager out there, and certainly one of the more popular among techs.
That counts towards the parent comment's thesis, not against it. If it wasn't a SaaS charging would be much harder.