Sincere suggestions for improving the better reach and growth of the site is welcome.
However while members can suggest positive ideas coming to their mind it is for the site managers, WM etc. to evaluate and accept and implement depending on their feasibility and utility.
Regarding the present suggestion, there have been suggestions and discussions in earlier times too. Though cc is not given as a routine for forum threads, selected forum threads are given cash credits. In case a forum thread is selected as topic for active GD contest, then that thread is given a cash credit of 30. Moreover some forum contests also facilitate cash credits.
In this particular suggestion the suggestion actually links and relates the cash credit of answer to be distributed to question also. That does not appear logical in forum threads. But there is already an inbuilt mechanism that the participants in the thread get a share of the overall revenue. (which may not be visible and reckonable at micro level). However it is stated many times that forum section does not generate much revenue in comparison to some other sections, Even then some forum posts are given some cash credits.
Indirectly also forum threads stand a chance to get more cash credits in the form of revenue share bonus if the author comes within ten top point scorers for content.
I think the best alternative for sincere members is to contribute consistently irrespective of cash credit or not. Then, naturally we may hope that when the site gets more revenue, the members also will be rewarded suitably.
Very recently AE questions are being awarded cash credits, though in early times even though there were suggestions it was not accepted. So there are review and evaluation of suggestions and ideas and some of them are suitably implemented at proper time and contexts. Sometimes even good suggestions were also awarded with cash credit.
I hope this thread can propel more positive actionable practical suggestions.