Good luck, and congrats on almost reaching the subscriber mark!! Keep it up, I'm sure you'll make it! ^^
As for my series pitch, I'm not sure still! I'm leaning towards at least posting on Webtoons as well, but Tapas is pretty dear to my heart. Maybe by the end of 2020 once I finish time-consuming freelance gig, I'll still apply. For now, I think it's best to think exactly what I want out of it.
It's tricky, because there are so many options, even with a "Premium Pitch." So I'll keep refining my outline and have friends help edit it.