Monthly delivery is a monthly exchange with another empire. Credits are automatically sent as long as the agreement is in effect. The acceptance of diplomatic agreements by computer empires is determined by several factors. A trade route is a route that connects a collected value of Starbase to the capital system and is necessary for commercial value to be exploited. Each updated starbase has an outgoing trade route that is by default directly connected to the capital, but can be manually redirected to any other Starbase (select the base in the mapmode of the commercial route, then click with the right button on the destination base to cancel or change the route). If the commercial route of a given starbase leads to another Starbase, the Receiving Starbase continues to send both its own collected commercial value and the commercial value received from the other Starbase “downstream” to the capital system. Once the commercial value has reached the capital of the empire, the capital system must contain a stellar base above the level of the outpost in order for the commercial value to be converted into tangible resources. Notes: Remember that this contract completely blocks any aggressive policy, so don`t sign with someone you want to conquer. Make sure your neighbours sign such pacts with you. Think about the length of the deal – if you have to bribe other distant empires to sign it, you should consider it. Offering an AI empire (instant trading offer with nothing against) can now (2.2.3) increase its opinion of you and create an option modifier of up to 100 for 2 years (“cheap trade”).
It works for all elements, including resources and systems, and it is a very useful diplomatic tool. It allows you to “bribe” an AI empire can be “bribed” to agree to do with you. At least temporarily. If you do a monthly trade instead of an “immediate” trade, you will receive a small “Trade” modifier for the duration of the agreement. This agreement makes it possible to carry out 25% cheaper research on technologies that the equivalent has already discovered. After moving the mouse cursor to the chord icon, you`ll see a list of available searches. If you select the trading exchange, you will automatically switch to that window. Here you can choose to exchange or simply pay for goods or privileges. On the left  are listed goods that you can offer – on the right  are listed goods that can be traded from the enemy kingdom. Besides, no, gifts don`t do anything. (And it is entirely possible for empires to reject trade agreements for which they are not asked to do anything) Note that you can see directly how much AI likes your offer in the business acceptance indicator in the middle of the window.
Fanatical cleaners only act with empires of the same species. Resolute exterminators only act with machine empires. In the center of the screen, you will find clues  about the probability of ending the exchange. For the other empire to only take into account your offer, the figure must be green – it will vary depending on the details of the proposal. The underlying is based on their attitude towards you – the more they look at you, the lower the cost.