Budget, budget, budget.
This game was made with straight 100 million dollars. They charged you/us monthly for subscription to keep playing. Make your research and you will see, I'm not exaggerating about the main expenses of the game.
Main reason to fail at the Reloaded version was removing the subscription and making it F2P, optionally letting you buy Premium. However, this was not enough to upkeep the maintenance to continously improve, create a difference & keep the cheaters away etc. etc. etc.
Nowadays, calculating the inflation. 100 mil should be around atleast 170-180 mil. But, barely worth a million at the current status I assume.
Long story short, I do not believe currently Little Orbit can or would ever start investing in APB Reloaded to resurrect it especially when the game has only 600-700 population which probably barely making any money if consider the premium being free for ages.
Game works on the budget to keep things as free as possible in the game. This is my perspective though.