I just have anecdotal information. I let my season tickets go, because they raised the prices and the secondary market sucks. I got notified that they have not released my tickets into the pool yet and that I can still buy them. Translation: No one has purchased them yet.
The guy from Ace who would take a lot of my tickets each season, told me that they are cutting way back on their inventory of Red Sox tickets. Last season was a very bad year for that segment of their business and their outlook for 2020 is not good. They will usually ride out a bad season to keep the relationship going, but they are seeing a bad trend. The offer that he made to me was for all the best games at a substantial loss. I don't mind losing $500 -$1000 to keep the season plan going, but if I start out at with a loss on day 1, I would end up taking a bath as the season progresses.