No I wouldn't. It is always and has always been easier to tax the middle class than the lower or upper class. No one likes the idea of a flat percentage fee. Yet look at the actions of spam accounts, they are the ones that have the power to spam, a tiny fee is not going to stop them from spamming if they want.
If the individuals behind Blurt really want it to become a social network, then they need to treat it as one. I honestly do not think at this point in time that Blurt will have much growth potential. I can see most of the images being used as being from on line sources, there is no method of control or prevent plagiarism.
Right now all Blurt is, is a crypto mining platform for the people that have enough blurt power to over come the transaction fees and to make some blurt.