What is the amount make PayPal ask for SSN ?

[Samtech]

Hi guys !!!
1- What is the amount make PayPal ask for SSN ? I mean if I make $5k a month is that make PayPal ask for SSN ? Or can please tell me what's the limit amont ??
2- how if I link bank account to PayPal account that bank account never been linked on any PayPal account BUT the name of that account doesn't match the PayPal account name ? Is that make problem ???
Hope u help guys with those two problems
Thank you so much

[sln531]

Usually this happens when it hits $20,000 then they start asking around for SSN