@elleevans Верно. Если целевой сайт использует собственную базу гео для ip, то имеет смысл использовать отдельные страницы этого сайта или API на этом ресурсе для определения гео ip.
Export your spreadsheet as csv file, than import it to BAS as a resource and set it to use each line 1 time (it is default setting I think). That way each thread would take new line from your csv file in run mode or as compiled bot.
As already stated, 2000 http client threads. 2000 browser threads would be quite an intensive operation to say the least... You would need a very powerful vps with lots of RAM, but even then I'm not sure BAS would handle it without crashing.