A Menu is a list of items (beverages & food items) that are available to be sold on the Web Register. These items can be sold individually or can be sold as a part of a combo deal. If you have menu items (products sold on the POS) and/or combo products that you would like to sell only during specific times, you can do so by creating time based menus. A time based menu is a menu that is governed by the time of the day, season, or occasion. Breakfast would be a good example of Time Based Menu. Yes, you can define a menu based on time like BREAKFAST MENU, LUNCH MENU, KIDS MENU etc. in Tagrain. To be able to use this feature, you must activate the Hospitality and Quick Serve plugin, This plugin is specially designed for small Cafes and Restaurants to allow them to who are selling food items like Burgers, Wraps, Sandwiches, Muffins, Pastries and beverages like coffee, tea and bottled drinks with ease.

Plugins in Tagrain are either Subscription Based or License Based. So the price that you pay for your plugins is based on the number of POS terminals that you have in your setup and the number of licences that you have acquired. There will be no change in your subscription amount in the current billing cycle if you are only deactivating the plugin AND not updating your Store / POS count.
You don't need to subscribe to the Hospitality for Quick Serve and Fine Dining plugin, as the plugin is already included in both the editions - Community and Enterprise. This means that you will NOT be required to purchase and subscribe to this plugin. You just need to activate the plugin from the Purchase Subscription Screen to unlock the Hospitality features.
Activating or Deactivating the Hospitality for Quick Serve and Fine Dining plugin will not affect your subscription amount for your next billing cycle because the plugin is free.