Last year was the best in comparison to my 5 years before. All IT sector is growing like never before. This year nothing has changed, except that people used to it more than ever (online shopping especially). So COVID might affect VH, AJ, GR, but definitely not TF or EE.
Not so many new items arrive in TF, as you say:
" 51,511 WordPress Themes & Website Templates From $2". and if I’m not wrong last year I have seen 75k items up there, but probably they just deleted old stuff.
By looking only at one particular category where I am, I saw only 3-4 new projects to arrive in a 1,5y period. So that`s not so big a deal I guess.
Now I monitor some new arrivals, their sales and etc. And also seen that their sales do not increase so much as worth it, or remain unchanged for 3-4weeks.
Yet I have a theory on how to fix it. But that might work only from the author’s side. I am still willing to wait till TF will find and fix the issues. There were problems with cookies and Envato API errors. I still believe that this all mess is bind with never-ending experiments and unexpired cookies after those changes.