There are no guarantees in life. As this is a free add-on, I reserve the right to stop supporting it at any given moment.
Any paid add-on I will support as long as I am able to physically, mentally, and emotionally, taking into account any time constraints I may have.
What kind of support are you expecting? This add-on does what it says on the tin., Nothing more, nothing less. I will fix any bugs that pop-up but that's about it. I have already spent way more time than I originally planned on this in order to accommodate some requests/ideas/improvements. I am not gifted., It takes me time to do this. I will continue to do so only as long as I'm enjoying myself. It is my free time I am sharing with you after all.
In regards to your reference that I now charge for the Bookmarks add-on, it simply reflects the time spent on making it and supporting it. I am definitely not going to get rich off of it and it certainly does not reflect/cover the amount of hours that were put into it. The charge merely ensures that I work on it even when I do not feel like it. The original Post-it add-on is still free and you are welcome to continue using it for as long as you want.