"While it might seem counterintuitive, paying to increase the reach of your posts can be the simplest, most effective way of circumventing this problem. It’s usually quite cheap, relatively easy to do, and can have very effective results.
What’s more, a successful paid post can have a knock-on effect on your organic reach in the future. When people engage with your posts, it sends a message to the social network’s algorithm that they would like to see more of them in the future. As a result, your organic efforts will be shown to more people as time goes on. An experiment carried out by Agora Pulse showed that the organic reach of 10 non-paid posts following a Facebook boosted post increased as much as 25% compared to past performance."