If it is only donation, nothing to worry about, but if they demand anything for their own agendas in return, I'd say it's concerning indeed.
Why should commercial banks make a donation (for the development) of an alternative monetary system, which is potentially a “
killer” of their business, even if these are banks engaged in brokerage activities?
If these donors care so much about bitcoin, then why haven’t they integrated it into their system yet?
Investors, for example, but not donors, may demand something in return. I would like to believe that the Bitcoin Core developers remain impartial and do everything only for the well-being of bitcoin.