That is the best win nowadays,RP are the most worthy of all the base prizes.I have been winning consistently every week the 5000 Lottery tickets during the last couple of weeks with just 8 spins per day and I even won a couple of GT tickets from these spins but for me gone are the days when I used to win RP 5000 often.It is without exaggeration more than 2-3 months that I don't win this prize despite having 8 spins daily,while the 5000 Satoshi I won it once or twice during such time,so the RP 5000 is the rarest of all prizes from the base ones.Congrats again.
If you check the WoF prize table, you'll see that users can win both 5k sats and 5k RP with the same probability. So 5k RP isn't the only rarest prize among the base ones, and it's just a random thing that you were able to win 5k sats instead of 5k RP. However, I would say that you were lucky in any case since you won 5k sats a couple of times in 2-3 months. Both prizes are pretty rare, and I wouldn't be surprised if I had no luck winning any of these prizes for 6 months or more.