Number of saves – VineGrab - the best way to view vines for Vine Review

I love this app,but I have one major problem with it. Why do we have to buy the coins to be able to save more vines. Why can't the coins regenerate over time to a set number and if you want more then buy more coins. Please consider doing that for this app.
Review by Marchingband_kid on VineGrab - the best way to view vines for Vine.