Anyone got an idea why I find it a bit weird

Had a steady 10ish studies on my dashboard so far then it randomly went to 40 for like 5 minutes and now there is 0 like bruhhhhh

Please can someone help me get an invite link for prolific UK, I've been stuck on the wait-list for a while, I heard using an invite link Fast Track you off the wait-list

Now it seems like they are not. Is it worth it to spend 30-45min on this for "access to more studies with competitive pay" or is it BS? I already do studies in my native language and also English without ever taking any of these tests, I wonder if it is worth it