1andreaaa. I had the same opinion as you, but think about it factually.
It was a lot of hard work for him to it and it still is (updating, support etc.). Especially the support, this is something I am really amazed of. He helps everyone, no matter how stupid the questions are. He doesn't make a big deal of setting up your PC correctly via Teamviewer. This really takes him a lot of time.
And think about what you get from this bot: pearls, mojos, gold etc. But let's only look at the pearls. For 5€ during an MHH you get 45.000 pearls. To get this with this bot it takes only a few days (in most cases less than one but this changes from server to server).
So I think it is only fair to charge money for this bot because it is not a bot like the others were (e.g. arky and x-bot were nice, too, but they didn't have this great support and were not working as good as Glittercollect). And the price is really fair.
Anyways, you can still use the version 2.51 for free if you don't like to pay for the bot, which works quite good, too. But if you want the get the "best" you need to spend a little bit...