Miguel, thanks for joining. We're glad you liked Avast, but... well, the achievment program was at beta stage for quite some a long time. It was thought to increase Avast word of mouth and fidelity. It rewards Avast paid product licenses among other gifts. Indeed that could be a bug.
But, maybe, the best will be round and enjoy the community, share your knowledge and help people with Avast or other security and non security issues. Welcome.