[rfctr]

SaaS are not immune too.

Example:

http://www.ca.com/ca/en/news/Press-Releases/na/2013/CA-Techn...

"... seeking ... an injunction against AppDynamics prohibiting the infringement of CA Technologies patents"

In case CA wins, the court will prohibit AppDynamics to sell any product that violate CA's patents.

Yes, one may host the company in Canada. How to sell to US customers though? VISA, MC and AMEX all have US presence and will comply with the court order (CA's lawyers will undoubtfully provide a copy). Paypal and other various Stripes are just facades to the very same VISA et all.

Without ability to charge for the product, where the business is going to be?

[WildUtah]

CA is in New York; AppDynamics is in San Francisco. Those are both places in the USA.

Getting an injunction against a company outside the USA for software running outside the USA is not within the claimed jurisdiction of US patent laws.

[rfctr]

So we has just established that not only hardware companies are at risk. Good.

Now, step two: US trolls will not sue a company doing business outside of US; too much trouble. But any company doing business in US is a subject to local laws, and most SaaS companies want to work on US market simply because it is the biggest one.

"Doing business in US" means, among other things, having US customers and using US payment processors.