I'd like to remind you that Bitwarden is becoming completely VC backed with the way it is going [0] and there is always a possibility that it can be acquired to give investors a return. The same happened with Keybase as soon as they took VC cash.
It is now growth at all costs until an eventual acquisition of Bitwarden. So I won't be surprised to see price increases on some plans soon.
[0] https://bitwarden.com/blog/accelerating-value-for-bitwarden-...