Randowhale is not so great concept. I used it few days back but then it never made sense to me to use it again. With only 2% upvoting, I only received 3$ on my post by randowhale, that means after transferring my liquid 2 SBD, I only receive 3$ out of which half goes to steem power and some part goes to curation rewards, then whats the logic to use randowhale.?
It was good back then with a high voting power but after hf19 there is a significant decrease in its voting power. I don't think it is great option to go for. Rather go for whaleshares in my opinion.