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but I think other platforms should try to use a little bit different algorithm than Steemit. Displaying in separate tab promoted posts in order... is IMO the most ineffective way to promote posts :) but at the same time I understand this approach.

For example I would like to see an option, in Busy or in eSteem, to put 1 or 2 promoted post in random spots on my trending page. If I would like to cheat myself and force me to take a look on promoted posts without a acknowledgement that they are promoted - then let me do that - this will allow me to do honest curation and support Steem network at the same time :)

There is some conversation about different approaches here: https://github.com/steemit/condenser/issues/1072