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This forum is a community like any other, it's a simple fact about any group or organisation that operates in the public. Times change and so does what can be seen as acceptable. There are rules BitcoinFX is aware of them now. It's a shitty way to learn, when you were acting without malice and inline with what you thought was acceptable. It is however the responsibility of anyone to be sure they are aware of the rules anywhere they frequent.
I did laugh at the part about not having been told to read the rules after they had been created. Makes me think of a terms of service agreement when they update it. Any service generally gets you at login time or something similar forcing you to acknowledge you have read the rules/guidelines. I never thought of it before as they were established long before I got here, but wouldn't it have made sense back then to have mass PM'd the forums user base.
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1. Indeed. However, having created this new mobile account I don't recall being made aware of any of the forum rules or even being asked to read them !2. Hopefully I'm much more amusing that that ... ?-
https://twitter.com/danny_knight/status/1139427428361629696
3. No don't do that !!! Wouldn't that be considered 'unsolicited' , 'bulk' , 'SPAM' !!! 
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Thank you for your kind words.