There is a single subscription to all plugins that you can purchase. Pricing for those options are located on this page: https://simple-press.com/pricing/
But, regardless, reviews are supposed to be about the FREE plugin, not about any premium options. www.ads-software.com doesn’t even allow vendors to offer support for any premium features on the support forum on this site. Everything on here is supposed to be about the free version.
Still, even if it wasn’t, if you’re using the plugin every day, then a low rated review is a little hypocritical. How can you find something so useful that you use it on a regular basis but still deliberately try to weaken it and the associated business?
Plus, if you are using it every day and something crops up where you need help, what are the odds that the developers or support staff will rush to help you after seeing how little you value their work?
Just some points to ponder…