That is not true. Simply tell them you will go to another provider who does allow this and they will change their tune. If you are on an OEM mandated website with an OEM vendor they may try to tell you it is a compliance or program issue but that is also not the case. They just don't want you to see the amount of money you get billed on your parts statement vs. what you actually spent so you don't figure out that 20.5% cut that Shift Digital and the vendor might be taking from you. Just tell them to give you read only access to your associated adwords accounts. Also them you want your Adwords account linked to your GA account so you can monitor performance from there as well. Any vendor that says you are not allowed to view their adwords account should be a RED FLAG.