About four years ago, I would sell several tracks a day a few times a week. Every once in a while a week might pass without a sale, which would make me wonder what was wrong.
The number of authors has increased dramatically, along with the total number of uploads.
As far as picking up again, it depends on what your definition of normal is.
It has become more difficult to sell tracks consistently in the last few years. I think that’s a combination of increased competition here at AudioJungle, but also more competition from other websites that sell RF music.