I had a domain registered to DynDNS for 10 years (5 at a time) because I was really happy with them, particularly back when they did free domains based off of subdomains on dyndns.org: that was a really helpful and useful feature so I supported them by actually paying for a domain long-term.
However the moment they were bought by Oracle I *IMMEDIATELY* put in a Transfer Request. The reason: Oracle I consider to be one of the world's most unethical companies, up there with Broadcom and Qualcom for various semi-illegal corporate practices and outright power-abuses. If you're not familiar with the stories behind OpenOffice, MySQL, VirtualBox (which forces people to sign over total rights and ownership of code contributions), and BerkeleyDB (change of license to an unacceptable one that's incompatible with Software Libre, forcing Debian to pull latest versions: many projects have converted to LMDB as a result) - the list goes on and on. If you're not familiar with these stories I recommend you *get* familiar, fast, and drop all dependency on Oracle as fast as you practically can. They poison every company they buy, including, sadly, Sun Microsystems.