I missed nothing :P. There's no verb "to successfully"...
Split infinitive
So you're equating text on an internet picture to academic writing now?

Also an example on your linked website:
I was told to always pay attention in class.
I was told always to pay attention in class.
The second phrase is just confusing, even if it is technically correct. Without punctuation it could be misconstrued in spoken English as someone being told, always, that they should pay attention in class.
Anyway OT:
