4. No competition on funded secondary industries - this looks like the 2nd option in the poll, but I'm not sure because the wording is ambiguous.
You are correct, when changeing the poll I forgot to change part of the wording for the second option. It is fixed now. Thanks for pointing it out.
As for your other options:
1: no competition on secondary means even 2 people that both like to compete on them would not be able to do so. Also if you don't like competition on your factory it would be relatively cheap to fund your own.
My first thougt was that to suggest makeing funded primary private as well. The main difficulty with that (imo) is posed by lumbermills: they are quite cheap, and can make a lot of money. Therefore, and in an attempt to improve the situation without causing too much limitations I changed the poll option to secondary. (Allso large 'farms' of primary industries in long goal servers might have a bad impact, but there might be no other way to tell than to have tested it sometime)
Unknowingly that reply kindof is a reaction to no2 and 3 as well.
As for the suggestion of different rules for different servers: It might cause confusion to players which could lead to lots of unfriendly situations based on pure misunderstanding. Therefor it should be avoided when possible.