Some Pokemon UNITE players are frustrated that they can't seem to earn any more Aeos Energy or Energy Rewards.
Pokemon UNITE not only rewards its players with the rush of victory after every match--but also with a set of special randomly generated items they can trade their hard-earned energy in for. Each battle awards players with an amount of Aeos Energy between 10-30 units depending on whether they won or lost. This comes in addition to the general Battle Points reward used to progress the trainer's level and Battle Pass. Often, such a small amount can make the grind seem endless.
Unfortunately, likely to make things fair, the developers had to cap the system somewhere.
Pokemon UNITE Aeos Energy Guide
Pokemon UNITE players can only earn 1400 Aeos Energy every week. This can be increased by using an Extra Energy Tank booster. Each reward from the tank is randomly generated from a setlist that can be found on the Energy Tank screen. A single reward costs 100 Aeos Energy, but the number of rewards waiting to be redeemed stacks over time. Players do not have to spin for a reward every time they hit 100 units.
Even so, the maximum amount of Aeos Energy Rewards a player can exchange their energy for is 30. The game will stop dishing out items after this threshold has been reached, regardless of whether there's still energy in the tank or not.
The reward counter resets every seven days. A timer of how close the next rollover is can be found on the menu screen.
More information about Pokemon UNITE's energy system can be found on its support webpage.