Don't think I've commented on this part, but this is a terrible idea even forgetting about hygiene.

People mixing up the spoons, using their knife to spread on toast and then putting the knife back in the jar, etc. It's easy to see why they should have individually packaged portions here. Jam can be presented in those small glass jars (is that what they used before I have to admit never taking any jam), the ones that are big enough for 1-2 servings.

I'd never use any spreads like this from a shared jar.

Shared bottles of sauces I can manage, but even then there's a strong argument for sachets.