No, they don't. If you understood what indulgences are, you would know that a Mass is not an indulgence.
And for that matter, a customary and token offering is made when a Mass is dedicated to a loved one. It's not like there is a fee schedule and it is understood that you are literally underwriting the temporal aspects of the Mass (e.g. paying the light bill) and not buying some specific spiritual bag of goodies.
That’s not what I’ve observed. I’ve been told that if you want masses said, you must pay and it’s not a token offering in any sense. Maybe in your church but not around here.
Either way, regardless, this is an utterly despicable practice (not the mass, of course, but even expecting a token payment).
And I totally understand exactly what indulgences were, their practice before it became notorious, when they were getting out of hand, what the money was used for, and so on. I know masses are NOT indulgences, I’m only paralleling the payment of a fee for a service. This is not a tithe or offering in the true sense at all. I would like to think that the good Catholics are already paying the “light bill” and so would have masses said for free. I know they are not.