Why is it that some articles about VC investments include valuation info (or enough information to calculate valuation) and some don't? There is no valuation in

Why is it that some articles about VC investments include valuation info (or enough information to calculate valuation) and some don't? There is no valuation information for this particular post. As an outsider, I don't understand why would a company (or VC) would choose to release or withhold that information.