This is very ambiguous.by Solitaire (Login Solitaire1)
Sentence in original post:
"Businesses rely on databases, dry stuff that probably don't interest hobbyists."
The "don't" is used to modify "databases" which is a plural noun. In this case, the "dry stuff" is a collective noun that could be either singular or plural, although it is correctly used with a singular modifier. Thus, the usage in this sentence is very ambiguous. There is a rather obscure rule that applies to a sentence of this type, which I may have to research when I get a chance. However, it does sound better with "doesn't" rather than with "don't." The sentence should be restated as:
"Businesses rely on dry stuff such as databases, which probably don't interest hobbyists."
I will edit my post to change the sentence and make it less ambiguous.