I used the shorturl method for ranking my 2.0. I spammed my shorturl in 10000 sites with gsa. Then I used an indexer with 10 days of dripfeed. On day 1, after 1000 link indexed, my 2.0 forcefully appeared on SERP. Before was invisible, even using "site:" On day 3, now my site begone again from SERP. I cannot find it anymore. Even using "site:". Is it normal?