> TOS, not changable and required on signup

Companies that regularly deal with large companies usually have the general TOS, and the TOS they'll agree to with large companies (or when reasonable sized companies check the terms w/ counsel before agreeing).

If I'm working with an easily replaceable supplier and they use my logo without explicit permission, it might be reason enough to replace that supplier. I remember being in someone's S-1 filing and getting a little bit upset (I can't remember if they notified us or not), but I can't really blame people for disclosing their largest customer by name is > 10% of revenue.

The enforceability of that is probably extremely weak, most plainly: does the person agreeing to the TOS have the right to grant permission to use the logos or trademarks?

Yeah, but it's still kind of a shitty move.

I don’t disagree at all :) these sort of scummy clauses deserve more scrutiny.