Let's not forget the faucet abusers back in the day, those dudes were claiming faucet every hour for 24 hours straight for days and even weeks/months until they got banned and that would yield a lot of profit for them. I personally am over the average as well but I have been around for years now so I can say it is obvious why I claimed so much, I didn't claimed that frequently ever but here and there faucet claims for the past 5 years equals to a lot of claims.
I made more money thanks to affiliate honestly so I didn't cared about the faucet that much but I can totally see the average being 0.005, this website literally gives away free money so a lot of people know about this and some even insists on staying and claiming for a long period of time. Then there is reward points which makes it even higher to claim.
The faucet abuse pretty much started happening recently like in Late 2017 and throughout most of 2018 before many sites started to reduce the faucet, block withdraws or just remove it all together. Back in 2014-2015 there were people who abused the faucet but not to the extent as they did now.
One example that comes to mind is Primedice back in 2015, back then you could of had a 2000 Sats faucet with a new account and no deposit needed. You could move your faucet all the way up to 4000 Sats if you had enough rollover to gain a higher rank. However back then BTC was only $200 so a 2000 Sats faucet was only like half a penny.
Did people abuse it? Sure they did but the admins and mods didn't see it as a huge impact as in 2017-2018. I remember people would have multiple accounts like "Jack0", "Jack1", "Jack2" and every few minutes in the chat box I would see "Jack1 tipped Jack0 = 0.00010000 BTC" and "Jack2 tipped Jack0 = 0.00010000 BTC" and obviously this person was violating many rules such as having multiple accounts and I asked the trollbox mods why they didn't ban him and they basically said they don't care. It was probably abused in such small numbers that it didn't affect. However when BTC reached $20K and the site was losing like 20 BTC a day on faucet abuse they had to do something.
I think that the 2017 FOMO rally just attracted many new adopters, some good and some bad and hence the 1% of faucet abusers ruined it for everybody.