Well... I know, I should not be doing so, but I am posting content on steem too... though I am HIVE supportor... why not anyway... until my steems are withdrawn, nothing to lose. Nothing illegal about it, considering any prospect of money is enticing thesedays and people do a lot of unscrupulous stuff worst than this... but I don't comment on Steem much... I don't have that urge...only comment on HIVE...
Anyway
Nobody cares anymore, and you can do what you like there. Cross-posting is common, as you say.. nothing wrong with that.
I cross post on publishx too(: you know
I have looked at it, but it appears all crypto talk. My content is generally not that.