I wish they would write a summary to explain why they believe the change in law seems necessary to them.
I can understand the purpose of this. Washington needs its residence to gamble locally which employs people within the state of Washington. Gambling services could be categorized as "Entertainment Services" and if services of a gambling site charges a credit card of a state resident, an additional charge for a tax could go to the state. However online services in the state of Washington would be exempt.