a bot is nothing easy to do but if they say can make then i think its possible
about open-source, there are two ways to qualify the word open-sorce
1- good bcs everyone (with a bit of knowledges) will be able to create or learn how to create a bot
2- bad bcs it will be rlly easy to bp for get the code, and the bot can become useless or very detectable
anyways, in both cases its a chance for novice programmers learn by reading the source (httprrequest or packets send/recv and more) , so it may help others
btw i voted c# in the other post cuz for me its easier than c++ for make a bot, but only opinion