I see signs now asking for a tip in hotel rooms. Lots of tipping relies on signs. Like at the register stand where the iPad is swiveled around asking for the u

I see signs now asking for a tip in hotel rooms. Lots of tipping relies on signs. Like at the register stand where the iPad is swiveled around asking for the user to input a tip percentage. By signs I mean things like you mentioned nudging one to tip. It’s not an overt sign stating it is expected but it is a sign letting you know that it is expected.