Sure. There isn't any Sedevacantist chapels near me and I no longer wish to financially support any of the other groups. I would love to attend mass and receive sacraments by any CMRI or other Sede groups but none are around my residence.
Also, I'm very disappointed in Bp. Sanborn's recent behavior as he has recently become a "Super Chat Bishop" with that layman Stephen Heiner. I never thought such a good Catholic bishop like him would stoop so low as to preach about rejecting most of the modern world while simultaneously using one of its most abhorrent technological creations, the "Super Chat", as a way to subtly fleece Catholics of their money. That makes him no different than any of the other insufferable "Trad Grifters" like Matt and Marshall.
Thanks for answering. I thought you might have some sort of legal argument, but this appears to be more of a matter of personal preference?
What obligations do we have to support priests and the Mass? I wonder if our obligations change if others already contribute more than enough? What they do with the money is their problem, though I think it reasonable to limit how much you give if you think funds are being spent on bad things, though any withheld amount should at least support the church in some way (charity).
How better to keep holy the sabbath than to attend a valid Mass? It is an act of perfect justice toward God that we can support and be a part of. It's too easy. God does it all for us, we just have to be there and participate in a small way. By receiving communion, we even share a part in the Mass with the priest, though an unnecessary one, because (if I remember the explanation correctly) a victim must be consumed/destroyed for there to be a sacrifice. It is a sort of heaven on earth; you get to see God, though hidden under the appearance of bread, you get to touch Him, you get to feed on Him to become more like Him.
Is anything more worth doing than working perfect justice toward God? Through Christ offering perfect adoration, perfect thanksgiving, perfect satisfaction for sin, and perfect prayer. Mass is the best part of each day.
If it's not worth convincing others, it might not be worth doing yourself. "Hey other people, don't go to the SSPX, and because there are no sede chapels nearby, you should probably just stay home and avoid Mass like I do, while maintaining a great desire to go."
Are you at least working toward moving to an acceptable Mass?
Personally, I don't have a problem with the sedes being right (if the church later declares such), I just have a problem with them jumping the gun and passing judgments that are likely beyond their authority to make. After the extraordinary (or rather quite ordinary, maybe rare is a better word) work of ABL, and practically little change since his time in the Masses offered by the priests of his Providentially started and maintained society, why avoid/reject those Masses? After all that Help by God, and they got it wrong? It is theoretically possible, but I have a hard time finding a better option despite any shortcomings of the SSPX.