Its your opinion, you paid for basic code (unique and new feature by the way) which price was 30 euro, and I agreed to sell if for you for 20 euro. If I would be like other, I would leave you without support after receiving money, but oh, well, I didn't. I was helping you couple of times, even via Team View'er but yes, I'm the worst guy on the planet. On my thread with achievement engine, there is not: "Free updates". Its quite obvious, there are free while there are new updates/fixes/changes. There isn't anything about 'I will update it every day' - If I would do it like this, guess what - I would increase price X times. 'Poor updates'? Your opinion, rewritten 50% of engine, if its poor for you, have fun editing it yourself. If someone thinks that by purchasing code for 20€, I will realise every whim of customer, whenever he will request it - you are wrong.
Making thread and asking people if they would be interested, is starting of development, but seems you have different opinion, up to you.