If you make it harder to claim him, though, you just make it more likely that Vargas gets outrighted off the 40-man roster to the minors, with a lower salary, worse benefits, further from the majors, etc. It's a trade-off -- the potential to send him outright to AAA later actually inflates Vargas's current value a bit, so teams are more willing to give him extra MLB time/money/benefits right now. Just a few weeks on a MLB regular season roster is probably more valuable than letting him choose what AAA club to play for. (Although he could get that choice in the not too distant future too -- he will likely be able to declare free agency in the next year or two if he doesn't stick on an MLB roster.)