I don't think I have ever been charged a resort fee at JW Cancun (or CasaMagna next door either) so free internet is a real perk even if maybe not a huge one.

Elite status (Platinum, maybe Gold also?) also gives you 15% discount on breakfast, maybe on in-room dining and restaurant dinners as well but not sure if I remember this one correctly.

We have always been upgraded, too, but we are not from US and have probably stayed there outside of US mass vacation times so maybe fewer Plats among other guests when we have been there.