Signed up for Equifax to freeze my credit, password can not be longer than 20 characters

Not only does the credit bureau max out their password length, you have a small list of available non-alphanumeric characters you can use, and no spaces. Also you cannot used a plused email address, and it had an issue with my self hosted email alias, forcing me to use my gmail address.

Both Experian and transunion had no password length limitations, nor did they require my username be my email address.