I used to get Hi5 invite spam. Perhaps they're just bitter that Zynga is better at spamming.<p>Let's face it, all these "social" companies use default opt-in and "let's spam your address book" and other unethical "viral" features - simply because complaining geeks are shitty customers anyway (don't click ads, don't install "apps"), and average Joe doesn't get it and/or doesn't give a damn.