I was thinking along the lines of those machines which payout higher for sequential and reverse royals.
Yes, those are the ones I never play. Higher payout at the top, lower payout in the middle (of the pay schedule).
It could be done as a casino-wide promo. Skyline Vegas this month has a bonus for diamond royals. I want to say the odds are similar for drawing a royal holding either 1 or 2 cards.
It's been frigid since November 2020 for Royals but, hopefully, Sweet C and my "RF freeze" is thawing. I now have 2 (one each on the last two trips of 25¢ or greater) and Sweet C hit one last trip as well. I'm about 18-19 for the year but the others are all low denomination 2-10¢. We did top 275 RF (25¢ or greater) between us since we began in 2005 this past trip.