I don't poke, I just move on. It is perfectly fine for folks to forget or get busy and anybody who does is not a bad person. I prefer 1. quicker paced long-term stories and 2. partners who will remember the rp. That's all.
I guess it comes from the fact that I don't have more than one rp on my plate at a time, so, I don't forget replies or messages. If you have so many stories that you lose track, then it's just not a good fit with me, personally.
But also...I hate poking and I hate being poked. I don't usually take very long to work on a reply, so, a poke someone would give to me is within 24 hours....and that is an irritating amount of impatience and insecurity to be confronted with. I need to be able to work on weaving this reply and be assured that you're okay and can entertain yourself for a day or so.
I loathe sending a poke message. It puts me in a very submissive and needy position to prompt someone or beg them for a post. Hopefully, we're on better communication terms OOC that I wouldn't need to ask if they were still interested. But I hate the sniveling, degrading way it makes me feel to inquire after their interest. So, I just don't. Two weeks of no writing will kill the rp for me; mentally, creatively, I have already moved on to the next craving and fantasy and lost touch with the characters we were writing. So, after about a week, I'd bump my RT and start looking again.
If it was still the planning stages and all of a sudden they stopped talking, I'd wait for three days and then move on. Planning is still fresh, still untilled ground, so, if they came back and explained the absence, I might jump right back from where we left off.
But if we were new partners, plotting and they simply stopped sending me messages, I would not dare send them a message. If they are dealing with stuff, I don't want to be that guy who needs to be reassured and comforted, another tax on their mind and energy levels while they're trying to handle real life stress. If they're no longer interested or simply forgot, we likely wouldn't be a good fit and I'll just look for someone who does fit me. No need for further conversation until they pick up the ball that is in their court.