Well... it's kind of strange for me when I see in some cases that someone is talking to a "spambot" on forums. I've saw too much of such spam, but I've seen a bot which actually asked about game support, and people replied, without signatures, and it actually behaved like normal person until they found out it was exactly same copy of bot from other forum. Maybe you're right about non-native English people, due to actual support you want to give out (on other forums where I've registered, they aren't so support-friendly due to let's say... not so smart replies).
I don't know about ads, but it can lead rarely to malicious exploit.
Sorry about doing such off-topic.