When I have free plan, do I get to see at least 10k events when I get actually over 10k events?
(now I’m seeing 0 events because I ran over the 10k quota)
Similarly, when I upgrade to Small 100k plan, if I go over the 100k, would I see 0 events in my account? or would I see at least the 100k events for the month?
You should be able to see all of your events, though it’s based on retention (which is 7 days for the free plan). That actually doesn’t make a ton of sense, and we’re going to revisit if pushing free plans retention to 30 days is a better idea. Otherwise you could send 10,000 events in the first 7 days, and then not see any after 14 days.
Was it recently reduced to 5,000?
Given that post was from September 2018, recent might be the wrong vocabulary 
It was adjusted to 5,000 errors, and our new plans also give you 10k transactions, and the 7 day retention window was increased to 30 days.
Yep, I see. We are using this amazing service for quite a long time, but somehow I’ve missed that change. Could you kindly explain what is the difference between errors and transactions?