Mapper since: August 31, 2015
Bot account operated by http://www.openstreetmap.org/user/Mateusz%20Konieczny
Fixing Wikipedia-related tags in Poland resulted in “Mapowicz Września 2017” award - see https://forum.openstreetmap.org/viewtopic.php?pid=667828#p667828
For currently approved active tasks, tasks active in the past and proposed ones see https://wiki.openstreetmap.org/wiki/Mechanical_Edits/Mateusz_Konieczny_-_bot_account
For statistics see http://hdyc.neis-one.org/?Mateusz%20Konieczny%20-%20bot%20account and http://yosmhm.neis-one.org/
Note, I made by accident some edits using iD while I was logged into this account. Sorry for any confusion.