Yes.So you think that having to opt OUT of her being a goddess means that she wasn't granting spells as a goddess as the default?
First, your argument for opting out rather than in is weak. It just says they are optional and then gives a reason why you might not what to use them.
Second, in D3, published prior to Q1 and authored by Gygax rather than Sutherland, there is no mention of her being a goddess. It's obvious that the Q1 optional rules are there to establish conformity with DDG, not because anyone had doubts about whether or not drow clerics were getting their spells from a Demon Queen!
Yes. Sekolah is not a devil. I've already made that point in multiple posts upthread. The DDG changes Sahuagin religion.The 1e Deities & Demigods lists Sekolah as a lesser god that dwells in Hell and makes no mention of him being a devil. It also says clerics can only advance to 5th level, which contradicts the MM which says that they can go to 8th level.
Again, I don't know what your point is.1e is notorious for contradictions that speak more to the chaos of the time, than the intent of the game designers. The races that are devil worshippers and get clerical spells in 1e are with very few exceptions also the races who worship actual listed gods.
In 1977, in a core book - the MM - someone (presumably Gygax) decided that Sahuagin are devil worshippers with clerics getting spells from devils. In 1980, in the first hardback supplement - DDG - someone (presumably Ward) decided that Sahuagin worship a god, Sekolah.
Which is more canonical? How does this difference in the two publications possibly establish any "rule" about whether or not archdevils can have worshippers and grant spells to clerics?