I do not donate because as you said, most devs are not developers at all, simply modifiers and tweakers of software created by the companies selling the phones. A true developer (eg someone who can write fresh code such as a camera driver for ICS or similar) would be a much more viable candidate to receive a donation, however this won't happen as seemingly no dev is able to actually code, instead waiting for official software. Until "developing" becomes more than copy-paste with a couple tweaks, I do not believe donations should be requested.
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Motorola Moto G - CyanogenMod 11 Nightlies - Furnace Kernel 1.0.0 - Android 4.4.2 KitKat
(Temporarily back on rooted, self optimised stock until CM11 in-call volume is fixed and camera doesn't look like crap)
Noza 7.0 - Rooted Stock ROM - Stock Kernel - Android 4.0.4 Ice Cream Sandwich