Oh, gotcha. I think it's best to hit 2-3 comic platforms if you can, but be careful not to overwhelm yourself. Having the option to schedule updates is a blessing, too, so you don't have to always remember to post things. Then you can just share those links on social media.
I think it really depends on where YOU like to spend the most time and where you want to cultivate an audience. Some are better geared towards it than others. And if you're just not jiving with a site, don't feel like you HAVE to be there. e.g. A lot of artists are on Instagram, but I don't bother with it because I'm at my limit of managing social media and I don't ever use it.
My comic is on Tapas and Webtoons right now. There's going to be a new site popping up soon I hear, hosted by the people who made Topwebcomics, so I might start posting there as well when that rolls out. But that'll be my limit, I don't want to be stretched too thin!