With many people fleeing twitter I noticed that both Counter Social & Mastodon Social started to slow down (I was briefly unable to connect to both too).
I think both are back up to speed (hopefully), but if you have at least $5/month to spare, PLEASE upgrade to Pro on Counter Social!
You will not only help support the site, but receive a ton of extra features like group video calling & access to virtual realms (what Facebook is unsuccessfully trying to do with oculus).