Although I'd expect anyone with investment or rent seeking ambitions from off chain infrastructure to deliberately want to damage the ability of the chain to quickly process transactions, in the expectation that it would (probably temporarily) provide them the high return they "deserve" for being "smart" enough to see things in such a kleptocratic way.

That way they get to operate an insular "company town" where there is no limit to what they can charge for various necessities because everyone is practically held hostage there, by the low speed/limited capacity of the infrastructure that serves it.

However in the real world this tends eventually to encourage external entrepreneurial development of transport links for trade, it's expensive to get there, but you can undercut the local tyrant and still make good money.... which would tend towards the tyrant protecting his monopoly with violence.