Possibly. The "dump" side could come if the devs who receive MSC bounties decide to sell all of what they received, or if a big investor decides to cash out. There's really no way to control that.

Companies do this all the time (buy back stock from investors), and I suppose they have a similar set of risks.

I expect that as long as we are completely transparent about what we are doing, the market will do a fine job of sorting out the liquidity and price. For instance, the knowledge that these MSC are being purchased only to be given away to others who might choose to sell them may prevent the price from going up as much as you might expect if we were buying them to sit on.