They don't have to advertise. Some outfit may gift you a week of timeshare, or a hotel concierge might be in cahoots with timeshare salespeople, and offer you boat rides or whatever in exchange for a sit with the TS salespeople. They push as if their lives were on the line for each sale. It's intense. You can find touts for the salespeople offering goodies at certain airports, lining the only exit aisle.

Only TS I recall unloading was the one in Waikiki that was sold to another corporation. Weeks went poof, but so did the fees.

SF bay radio has lots of "get rid of your timeshare" ads.