for what potential reason?
Realistically I see two potential reasons:
1. Burn dust.
You will see that in many cases the amounts sent are very small. I guess that some use it as a safe burn address for the extra dust from their transactions.
2. Send a message.
* Some use vanity burn addresses for that as you can see in tx 55571ca5e1f86c11a5ec5837aa1edf4262042b4b18379373585047ce8f8938cf
* There may be hidden messages in some of those tx' OP_RETURN, but I don't know them.
Of course, there are unrealistic potential reasons too, the top one being that some may be under the impression if they send coins there they make a donation to Satoshi.