Ask yourself why there isn't more welcome bots, after all Steemit and Hive have been around for a long time.
Bots that blindly greet all users with no intelligence have never been welcome in Hive (or Steem)
The original bot that did this was @wang.
https://hive.blog/@wang
It's been flagged down to -10 rep. You don't know the history. There is nothing new about this.
Your bot serves to advertise your witness, what if all top 20 witnesses did this?
So luring to a different, buggy frontend like inleo is fine, but pointing to a useful post is not?
Anyway, I have stopped the welcome message.