No because I would MUCH rather draw the Kati or the Masanori, than Hostage for it. Hostage increases the cost by $1 and 1 click. That kills most of the value you get out of the card.
Something needs to be much more important / larger gain to justify Hostaging for it, imo. I wouldnt play a Kati of Masanori that cost $5 to put into play, and thus I wouldnt Hostage for one.