In my opinion, the biggest risk to Paulson (right now) is the number crunching CFO's who are watching the casino's bottom line.
Let's face it, Paulson chips wear much faster than their plastic/Bud Jones counter parts; some one working the numbers will easily find (long term) savings in Bud Jones chips that, while being more expensive up front, will last much longer on the tables over the course of 5, 10, or 15 years. Paulson chips are cheaper out of the gate, but need to be replaced more frequently due to wear and tear, grime, gunk, goo, etc. I'm sure this is something not missed by casino execs, and part of why we're seeing a switch to BJs in some establishments.
Expanding the issue outside of basic dollars and cents, let's be honest... Paulson has never been able to replicate the pre-lead-ban weight of their chips like Bud Jones has. Bud Jones tip the scale at 11grams each and every time, whereas Paulsons are lucky to hit 9grams on a good day (and that's also color dependent). This gives Bud Jones chips a more substantial feel in a gambler's hands, and I'm sure that is not missed by those making entertainment/casino based decisions at the executive level.
Now - all that being said, I do not think Paulson is going away, but I think there are very real issues/considerations that are pushing casinos to Bud Jones and similar plastic based chips. I think smaller casinos, and those with limited budgets, will continue to run the risks on the "faster wearing" and lighter Paulson option, but those making significant outlays in primary and secondary racks may perform deeper cost analyses, and likely find the plastic chips the better long term solution. Even if a majority of players hate their "sticky" feel.
That's just my oh-two.