There is no limit to the number of visits with the Priority Pass membership bundled with the American Express Platinum card. "Select" excludes CO/UA lounges beginning 10.1.2011 but has nothing whatsoever to do with the membership plan level: Prestige, Plus or Standard.
I just applied for it, cant hurt to have both, travel via AMS freq to Africa, and it has proven very handy, may not renew the PP basic card since I hardly everu use it in the US