Yes, depending on the plan you select, you select either 20 or 100 products to list on Shopbot.

If you want to change your products, you can go back to Feedibot plugin and de-select the products you want to remove from shopbot and this will allow you to add other products to your listings.  Please note once you do this, it will take 1-2 days to update on Shopbot.

Prices are updated once a day on shopbot and the plugin does this automatically.