At the end of a rather silly thread complaining of all the terrible stuff available on Otzar Hachochma, etc. ,etc, I saw a link to the following letter from an OC staff member:
I don't question Otzar HaChochma's decision, at that time, to remove the Seforim that their more close-minded customers would find problematic. But at this point, when we already have a Bnei-Torah and non-Bnei Torah (I would assume R' Yosef Zechariah Stern (and many others) was not a Ben Torah by their standards (see Sdei Chemed Pe'as - s.v. Aba Mezakeh)) versions, perhaps they could place the already scanned seforim back onto the program.
Parenthetically, Levinsohn (Rival - author of Teudah B'Yisroel) seems an odd person to pick as the arch-representative of the evil Maskilim. Levinsohn was highly respected by such famous scholars as R' Dovid Luria (Radal), and R' Mattisyahu Strashun as can be seen by their letters to him in Be'erot Yitzchok and R' Yisroel of Ruzhin even supported the publication of his works.