#1 Her Desire - I am a solo developer and doing two games at the same time isn't doable.
I'm sorry, I'll be blunt here. But that's a weak excuse. No one expects you to do them at-the-same-time. You wouldn't be the only single dev with more than one game on the design table, if only to prevent burnout.
Hell, I bet if you ask folks, they wouldn't mind you switching between the two. Especially since you stated already having ideas for 2 more seasons for HD.
Which ultimately can only lead to CT ending up in the trash bin. Personally, I wouldn't mind at all if the time between updates for each became longer if you work on both of them in turn.
#3 Monetarization Platforms - This is really the main reason. Have you seen the issues people are having with these services and with these types of games? If not, then understand they have been shutting down pages and CT is prime giving me issues.
Change platform, you've been given a few suggestions already of ones that aren't as strict, like Subscribestar (might want to stay clear from Boosty, heard from another dev they can be shitty with forwarding payments).
Plus, given the direction HD is going it's only a matter of time before you get axed on that not-to-be-named site.
CT needs a re-write and adjustment to make it not "dance the line" so much - and at the moment I don't have the time for it.
No, it doesn't, the only thing it needs is to 'cross the line'. Which would be a natural progression of its current state.
But, in the end it's your call. Even if we may not like the decision.