You’re fine! Tone is hard to convey through text, I’ve gotten hit with people assuming that I’m being a mean jerk because I don’t often fluff my statements. 
Linking up the support article re: advertising and some other relevant posts. I will point out too, this is the most moderated forum there is. So anyone who is pulling some random rule or policy out of thin air won’t last too long. If a SFA doesn’t sweep in to chastise (or just delete) the falsehood, you can be sure the regulars will speak up in how they are misguided in their thoughts. So if you see people being quoted or saying how X is supposed to, it is most often times the truth. We’ve got some regulars around here who know the policies pretty thoroughly and we’re happy to try and help folks avoid getting in trouble by sharing this knowledge.
I’ve seen several threads over the past year or so alone with people who have been sanctioned for using LFG specifically incorrectly, and also for just spamming any and all channel for guild adverts, sales, services and the whole spectrum. And too, just because you see other folks misusing channels, doesn’t mean they’re being allowed to while others aren’t. Those who are still misusing them are either unknowing of the rules or their reports are still in investigation and they just haven’t been hit with sanctions yet.
This person was recently given official “warning” dialog due to using LFG to advertise for their guild formation. They stopped before being sanctioned, heeding the warnings and coming here to try and figure out how and why they were likely being warned.
This instance, the OP had been getting hit with warnings as well, but you’ll see they make mention of “not LFG anymore, as I was told that was not allowed a bit ago” that Vrak even used in his quote to respond. If it were untrue, he would have squashed it, not used it in his reference point:
This is just a short three-post thread, but it has the relevant question asked, answered and rubber-stamped by an SFA.
For guild and raid teams, trade and general are okay. But GDKP guilds are a bit of a grey area since you’re essentially looking or even hiring (in a sense) to assist in the sale of runs and/or services. It’s not the typical guild recruitment, it would veer more into the sales aspect (me note - if any of our SFAs or folks want to correct me on this, by all means!). I personally would err on the side of caution and keep it in trade. If you really want to try your luck with general channel, that does open you open for being reported for sales or even spam for going across multiple channels.
If you’re trying to fill raid spots that you are NOT selling, you can use LFG. If you’re trying to hock the last few raid spots for participation in a GDKP run, you keep it to trade.