Is there an approximate specs per number of users guide to size a lemmy instance?

I thought about this the other day. Yes a feature for a user preference to open (even posts within lemmy) in a new tab would be a great addition. It would likely be easy enough to create an extension to do it too (kind of like RES for reddit).

Do you happen to know what service that's with? Trying to see what resources that takes. ($25-$30 can mean very different specs depending on where it is hosted). Ty.