yes--IF you're an airline employee WITH access--if not, ID90 membership gives you the same access IF you don't have that access w/your airline.
The fare calculator came from ID90.com. I can guess but cannot confirm that the airlines that use it, bought it from ID90. I've used it for years before DL made it available to employees. It's nothing new to me but can be obtained by OALs that don't have it provided--they just have to pay. Ergo, I stand by my statement. It is NOT limited to the employees of participating airlines.