Nothing sly or sneaky about it. She said she will announce in the Sept/Oct timeframe. They can, should they choose, end her contract now if they feel the slightest bit lied to or if she was in some violation of contract.
Realistically, their lawyers, and hers, would do nothing else if anything “underhanded” was afoot, don’t you agree?
Or maybe it just means she’s really not running as she’s able to keep the funds flowing to her SarahPAC by keeping her supporters in suspense. Once they find out she’s not running some of the supporters would then donate elsewhere.