But the use of vanitygen with powerful processing unit like graphics card or ASIC can make it possible for the addresses like that to be generated which will be in uncompressed format. I do not know of this will be possible but there are addresses that have been generated but customised in a way to have the letters and numbers someone intended want to include in his bitcoin address.

I guess it was the reason only low bitcoin amount was sent to the addresses because without private key the bitcoin can not be spent.

Right, bitcoin addresses. Seems like bitkeys.work is cheating about what .csv they have as these should be all market-available bitcoin addresses, but in effect this is sth like forgery.
If decoding these addresses makes such strings it says that this is a prepared .csv file.

So it looks like this .csv is fake. Or someone has produced tons of bitcoin addresses based on human readable sentences.
These should come from private keys in a manner that the probability ok being a sentence should be very low.

I can see now that there are many more strings in that csv.

Or am I missing sth here?

They say that they share all public keys = bitcoin addresses which are on the market. That's info from their webpage.

I've extracted strings from these addresses and they are ca 30-50% human readable sentences.
If they are produced from private keys, they shouldn't be human readable sentences.
It's fake for that reason.

Ok, they just created them, but they are not sharing the public addresses where on the webpage it is strictly said that these are from market.
Addresses which have any balance.

EDIT: Ah! I understand now!
These are addresses which there was BTC sent to, they don't have to have private keys.
Ok, got it!

It is trivial to create a valid bitcoin address containing any string of Base58 characters (within the stipulated length limits) and send coins to that address. You can do it yourself here: https://gobittest.appspot.com/ProofOfBurn. You will find many such addresses with coins sent to them throughout the blockchain. In addition to the one BHC has shared above, well known such addresses (with hundreds of even thousands of bitcoin sent to them) include:

1BitcoinEaterAddressDontSendf59kuE
1CounterpartyXXXXXXXXXXXXXXXUWLpVr
1ChancecoinXXXXXXXXXXXXXXXXXZELUFD

Just because no one knows that private key to spend coins from these addresses, does not make the addresses fake in any way. They are still completely valid, as evidenced by the fact coins have been sent to them. If you try to send coins to an invalid address, the network will reject your transaction.