Some cafés that genuinely want your business make plugs available to the customers, some will even go as far as to put in plugs with USB adapters as well because they are making it clear: I want you to be here. Other places have no special extra plugs (just what you'd expect for a room that size) and that's fine, but some places have intentionally NO plugs and that's not an accident, that's by design.
Same thing with the wifi policy. I don't care if you have wifi, or don't have wifi, but if you aggressively block ~50% of all sites, seemingly at random, or have a time limit on usage…the message it clear, you only have Wifi so you can say "we have wifi" but you don't really mean it.
I only hope to patronize places that are welcoming, even if I'm not relying on those facilities that day. Those are the kinds of places I want to stay in business.
The kinds of places with limited internet and no plugs are the kinds of places that I don't want to be in business tomorrow, so I had better make sure not to give them a penny today.