It's because the creator of this PowerIn is quite rude, sometimes aggressive, and ignores users' feedback.

Complete bait-and-switch scam. The app initially worked well with personal and company profile posting capabilities, including multi-language support. However, the developer suddenly removed the core company posting feature, forcing users to upgrade to a higher-priced monthly package.

Even worse, they're now relisting the same product under different profiles on AppSumo to avoid negative reviews. AppSumo seems complicit by allowing this practice to continue.

It's unacceptable that they can sell a product with promised features, then disable those features after purchase. Save your money and avoid this developer completely.