I’ll stop you here. Google offered it for free and, at the time, offered such an high amount of mail storage for free it sounded insane. At the time, my ISP gave me a 25MB or 50MB inbox and that was considered pretty decent, when Google was trying to get people in with 1-2GB.
They absolutely have a right to take ant steps they deem necessary to prevent malicious use of their product, and certainly aren’t obligated to provide it for free, but Google wasn’t forced to provide a free email service, much less one that went so far above and beyond their competition.