Disclaimer: I'm no lawyer, so these are just my own thoughts (and not those of IwantU!):
1) Political corruption is still VERY strong here in Costa Rica. With the number of sportsbooks here and the cash going around, I think it's highly unlikely this will pass anytime soon or at all...
2) It's Costa Rica. Even if it does pass, it could take years to be enforced.
3) From that link, I think it's important to note this:
"However, foreign individuals living in Costa Rica who can prove that their income has already been taxed in another jurisdiction, or are able to show that income is to be invested in the country, would be exempt under recent amendments."
We are becoming ISO-certified as well as hoping to employ up to 140 local Costa Ricans by the end of this year (we're renovating a new building beside us as we speak to fit more employees) and doing things to keep the government happy here.
However, we shouldn't have any problems proving we've been taxed in, say, Panama - thus becoming exempt.
There are other loopholes that exist as well to avoid Costa Rican jurisdiction
So I for one, am not worried about it.