Long and short of the HF20.
Everything done on steemit now costs system resources.
Prior to HF20, the cost of a resteem on steemit resources was not defined at all.
After HF20, every resteem depletes your RC by a certain percentage, and every resteem confirmation comment depeletes RC even further
Conclusion of the matter:
HF20 has made resteems more relevant on steemit. By placing a cost on activities done on steemit, resteem services will become dearer to use over time, as RC usage will in the long run justify the prices pegged by resteem services.
Lets see how this all unfolds