Duly noted, and I completely understand. I’m working on changing this and being up-front on the description and landing page about the payment/upgrades.
To be honest, I had no idea that this plugin would catch on like it has, it was a weekend project so I hadn’t given much though to marketing and payment disclosure/etc. I’m subscribed to plenty of monthly services myself and I’m in the same boat as you, I hate it when plugins don’t fully disclose everything.
You have my word that I’ll be fixing this, stay tuned- and thanks for the feedback.