The lease with the landlord for office space is not contingent on how much revenue is generated by the tennant (As opposed to a lease in a mall). Even if they were to move out during the term of the lease, the tennant would still be obligated to the landlord for the lease payments.
The economic benefit you add to your employer is thus unrelated to their obligation to pay the landlord.
The time spent posting on the internet is not hurting the landlord either, so there would not be any l’shem shomayim in spending lots of time doing that to decrease the benefit to Trinity