Running scams is a very profitable business; compliance with DKIM, DMARC, SPF, etc. anti-spam standards only adds some minimal overhead. Scammers checking and tuning their messages to penetrate various anti-spam defenses probably costs more...but I'm sure there are AAS versions of that, these days. So that's just another "what's the RoI?" decision.
Vs. what does GMail's RoI look like, if they spend a few $million more on spam/scam filters? Even for the paid GMail accounts, how many customer decision makers actually care?
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Running scams is a very profitable business; compliance with DKIM, DMARC, SPF, etc. anti-spam standards only adds some minimal overhead. Scammers checking and tuning their messages to penetrate various anti-spam defenses probably costs more...but I'm sure there are AAS versions of that, these days. So that's just another "what's the RoI?" decision.
Vs. what does GMail's RoI look like, if they spend a few $million more on spam/scam filters? Even for the paid GMail accounts, how many customer decision makers actually care?