Oke vote books or ckeys tradeable ofc. Ckeys are tradeable already in osrs but with another rewards, cw tickets tradeable doesnt feel allright. Tbh, not many people play it on a rsps. So why tradeable? No point to make it tradeable. If everything is tradeable the fun is gone.
Ok so say for instance they make CW tickets tradeable and put in rewards that are medium/high ticket or medium/high priced items for instance they put in an item worth 100M for 200 tickets ( not even getting into maybe untradeable items that would be sought after just a normal item or item only obtained from cw ) lets say 1 for 1 that would make each CW ticket 500k but obviously there's going to be a bit of a decrease in price cause 1 for 1 wouldn't make sense say tickets go for 350k that means every game people can make between 350-1050k right now at most a ticket is worth in cw is 32k a ticket if you buy and are able to sell parts of a dagonhai set that means you can make more money killing pretty much anything in alora which makes no sense to play castle wars. Just like in LMS there's almost no rewards that are worth anything or seem to be tradeable so LMS is a dead game in here too. Places where castle wars and lms are profitable people play them like crazy.
TLDR it's almost pointless to grind CW/LMS due to low cost or no use rewards make them a decent way to make some money and they'll be enticing to play also they're fun so it will be a new and fun way to make money. If their minigames are profitable i'm sure people who enjoy them will come in and current players will start to play them.
I'm sure if staff came on and said each person who is on a winning team of CW gets 1m people would be popping in there to play some matches just like they do with LMS making 50m pools to the winner.