I have posted answers to several questions and posts just like this one. It appears that the main element in obtaining a high profile score is the number of visitors within a specified time frame. Hub hoping, forum participation, answering and asking questions is fine, but they seem to be useful for maintaining a high profile score. Sample: author with 2 weeks on this site, 8 hubs and 11 followers and a profile score of 91. Unless this author spends all day hub hoping, answering and posting questions, participating in forums then there is no other explanation.
For the last 2 months I have been hub hoping several times per day, answering and posting questions, and participating in the forums. Due to my topic of choice, my traffic is steady but not exorbitant and my profile score has remained about the same. On occasions on which I have seen a sharp raise in the numbers of visitors, my profile score has jumped three to four spaces. Then when the number of visitors levels out, the score drops again.