I was told a while ago by support that when using the munchkin tracking on a domain which top level domain had only 2 letters, we had to set the domainlevel munchkin init parameter to 2.
Reading the doc, it seems that this parameter has a totally different effect :
Sets the number of pieces from the page’s domain to use when setting the domain parameter of the cookie: domainLevel: 2 will set the domain parameter to “.example.com,” while domainLevel: 3 will set the cookie to “.www.example.com.”
Based on this doc, it seems that the use of it would be to handle situations such as mydomain.co.uk (common UK URL) or mydomain.com.br (Common Brazilian one) (in which cases it should be set to 3)
Question 1: Who is right, the support or the doc ?
Question 2: I also gather from the fact that the parameter is not usually needed when on a mydomain.com domain, the default value is 2. Is this correct ?
Question 3: do I have to change it on a Marketo LP that is hosted in a mydomain.com.br ?