I think the Electroneum technical team is not competent enough: that's a bunch of junior PHP programmer.
Given how shitty PHP as a programming language is, , and given the juniority of the team I really doubt if Electroneum could do what they claim: scale onto hundred millions of phones.
Why do you have an Electroneum referral code in your signature then?
Please explain your opinion in greater detail because it means nothing when you don't back it up with evidence.