On the mainland between Cancun and Tulum you have taxis, ADO and Mayab buses, colectivos and Playa Express (Cancun to PDC only?).
Granted this covers multiple towns.
Imagine a couple at a southern Cozumel hotel. Roundtrip taxi to/from town around $40 USD. That is pricey and I suspect that people will not do it often...if ever...on a typical trip.
Increase that cost to around $50 USD and the number of people going downtown will decrease.
Now drop it to $10 or so per couple and what do you think will happen? The number of folks who will go to town will increase.
Granted this covers multiple towns.
Imagine a couple at a southern Cozumel hotel. Roundtrip taxi to/from town around $40 USD. That is pricey and I suspect that people will not do it often...if ever...on a typical trip.
Increase that cost to around $50 USD and the number of people going downtown will decrease.
Now drop it to $10 or so per couple and what do you think will happen? The number of folks who will go to town will increase.