There are 2 strategies for rentals. Matching up with an owner while availability exists, like your example. Most are happening with a lead time between 6-11 months, because after that the options are often slim to none. Especially during high demand months like fall and low point seasons.
The second way is to hold something relatively popular and wait for the above option to dry up, and usually by that point cash discounts/offers have dried up or hold little inventory. At 2 to 5 months out from the reservation date, that $400/nt CCV or $500/nt BCV studio starts looking much better if the only competition is over $300 for CSR/POR, over $350 for CBR, and over $400 for AKV/SSR.
Covid pushed so many points forward that availability got really tight, making it harder to rent the traditional way. Brokers started advising clients to book first, then find a renter later. Spec renting took off. But before that brokers typically only allowed them as last minute distressed reservations, maybe 8 weeks out. Probably as a measure to prevent upsetting
DVC. Covid pushed the necessity to test the limits, which ushered in the normalization. The result was more places to run this activity, and more owners savvy to higher earnings of spec res. Cat out of the bag.