I don't believe you are tying one service to an unauthorized, required service. You are making a donation to (a related?) entity based on the business you receive. I can't speak to any trust/ethical issues, but I don't believe it is tying.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell