Here are three examples collected from the Internet:
(1) Teslamotors.com is for many, the first introduction to Tesla and EVs. (one-comma version)
(2) This last point is, for many, the most important for those tasked with making decisions for the recently deceased. (two-comma version)
(3) SU's website is for many the first experience and interaction with the university. (commaless version)
Apparently, all of the three examples are mutually equivalent in terms of structure and semantics. I am not sure whether they really mean the same since I have found an author used the two-comma version in juxtaposition with the one-comma version:
If writing was, for Shi Tiesheng, a way to avoid suicidal thoughts, it is for many prominent thinkers in the urban intellectual Christian circles, a vocation.
Do they have subtle difference or it is simply a stylistic choice?
Thanks in advance.