Having been on both sides of acquisitions involving large companies, survived multiple layoffs and dealt with the disruption caused I'd say the last thing you want is for your favorite small development studio to be bought by a larger company.
At best you're looking at delays, potentially cancelled projects and lots of stress on both sides. A bigger risk is that key people will leave, get removed or shuffled into the larger organization leaving you with nothing but a brand name and stagnant products. Big companies have a bad habit of forgetting that the most important part of the company being acquired is the people who work there.
WT seems to be an exceptional case and were of course working for free before being hired on. I'd say that as long as your favorite developer is financially healthy and producing good products, just let them be.