Many games has something like a buffs system where you pay an amount of in-game currency and you get a buff for a short-time like "double XP for 30 min" in Pokemon Go for example.
It would be nice to have it here, not everyone are interested in items, pet slots and all the things that you can pay CSC with so I think it would be nice to open the CSC use to more areas.
Here are some example of buffs: (times and numbers are only for the examples)
get a second oven for 12 hours at the Bakery.
Pet is always hungry for 30min or 1 hour
Bribe the Hustler and get a second chance to choose a box (limited to 3 bribes a day)
Higher chance to pop up a minion from a bubble for 30 minutes
10 minutes of hints in Leviathan Harpooning/Mind Reader/Reflection/Fishing etc.
5 minutes of 10%/25% discount in the MC and Antique Shop
Higher chance to get more crystals in the Fragmentizer for 10 minutes
And more and more.
The buffs are not game breaking, everyone can get CSC now thanks to the bathhouse and the price can be something like 5-50 csc depends on the buff..
I'd really rather see these as something that doesn't require CSC. I feel that there's enough things to spend your CSC on at the moment, even with the Bathhouse handing tiny amounts out.
Maybe a chance to get them as a RE buff when you have a GA active instead. Make some of them very limited, expensive buyable buffs from the MC, or Blue Building... A random event like the Oracle quest that gives you a buff as a reward. A temp reward for beating an opponent a certain amount of times.
Something to add to the gameplay and to make you stick around on the site more vs. the good ol' mechanic of "insert real money, get instant perks".
[sub]Also, I really don't like microtransactions.[/sub]